UGC NET Paper 1: Held on 1st Mar 2023 Shift 2 (Previous Year Paper)

Key Points 

The channels of SWYAM PRABHA are uplinked from BISAG, Gandhinagar.

SWAYAM PRABHA:

• SWAYAM PRABHA is an initiative launched by the Government of India to provide educational content through direct-to-home (DTH) channels for students across the country. It aims to enhance access to quality education, especially in remote areas where internet connectivity may be limited.
• The educational channels for SWAYAM PRABHA are uplinking from BISAG, which stands for Bhaskaracharya Institute for Space Applications and Geo-informatics. BISAG is an autonomous institute located in Gandhinagar, the capital city of Gujarat state in India.
• BISAG is responsible for the uplinking process, where the educational content from various sources is compiled and transmitted through satellite communication to reach the DTH platforms. It ensures the seamless transmission of educational programs, lectures, and other instructional materials to the SWAYAM PRABHA channels.
• By uplinking the channels from BISAG in Gandhinagar, the government aims to centralize the content aggregation and distribution process. This allows for effective coordination and quality control, ensuring that the educational material delivered through SWAYAM PRABHA is accurate, relevant, and high-quality.
• The initiative has been beneficial in reaching a wide audience, including students, teachers, and lifelong learners, who can access the educational content broadcasted on SWAYAM PRABHA channels through their television sets.
• It provides an additional avenue for learning and supplementing traditional classroom education, particularly for those who may not have access to the internet or online resources.

Key Points

 Statement I states that the TPACK (Technological Pedagogical Content Knowledge) framework was developed by Mishra and Koehler in 2006.

• Mishra and Koehler introduced the TPACK framework in their seminal paper titled "Technological Pedagogical Content Knowledge: A Framework for Teacher Knowledge."
• The framework was published in 2006 and has since been widely used in educational research and practice.

This statement is correct. 

Statement II states that the TPACK framework comprises a total of six components.

• The TPACK framework actually consists of seven components, not six.
• These components are:
• Technological Knowledge (TK),
• Pedagogical Knowledge (PK),
• Content Knowledge (CK),
• Pedagogical Content Knowledge (PCK),
• Technological Content Knowledge (TCK), Technological Pedagogical Knowledge (TPK),
• and Technological Pedagogical Content Knowledge (TPACK).
• Each component represents a different aspect of knowledge that teachers need to effectively integrate technology into their teaching practices.

However, this statement is incorrect.

Therefore, the correct answer is option 3) Statement I is correct but Statement II is incorrect.

From Table-2, we know that the ITOs make up 11% of all vacant posts. So,

For Bank A, the number of ITO posts is 11% of 800 = 0.11 × 800 = 88

For Bank C, the number of ITO posts is 11% of 600 = 0.11 × 600 = 66

If we're told that some of the ITOs have left Bank A and joined Bank C, and now the number of new recruits of ITOs in both banks are equal, this means that the number of ITOs in each bank is the average of the initial numbers:

Average ITOs = (88 + 66) / 2 = 77

This means that 11 ITOs must have left Bank A (since it initially had 88 and now has 77), and joined Bank C (since it initially had 66 and now has 77).

The percentage of new recruits who left Bank A would be calculated as follows:

Percentage of recruits who left = (Number of recruits who left / Total initial recruits at Bank A) × 100

Percentage of recruits who left = (11 / 88) × 100 = 12.5%

Therefore, the percentage of new recruits who left Bank A is 12.5%.

First, let's calculate the number of Law Officers (LOs) in each bank. According to Table-2, LOs make up 10% of all vacant posts. 

For Bank A, the number of LO posts is 10% of 800 = 0.10 × 800 = 80

For Bank B, the number of LO posts is 10% of 940 = 0.10 × 940 = 94

For Bank C, the number of LO posts is 10% of 600 = 0.10 × 600 = 60

For Bank D, the number of LO posts is 10% of 820 = 0.10 × 820 = 82

For Bank E, the number of LO posts is 10% of 450 = 0.10 × 450 = 45

For Bank F, the number of LO posts is 10% of 560 = 0.10 × 560 = 56

Now, let's add these up based on the given groups:

The number of LOs in Banks A, B, and D together = 80 + 94 + 82 = 256

The number of LOs in Banks C, E, and F together = 60 + 45 + 56 = 161

To find the percentage by which the number of LOs in Banks C, E, and F is less than that in Banks A, B, and D, we calculate the difference between the two, divide by the number of LOs in Banks A, B, and D, and then multiply by 100:

Percentage difference = ((256 - 161) / 256) × 100 = 37.1%

Therefore, the number of recruitments of LOs in Banks C, E, and F is 37.1% less than that in Banks A, B, and D.

First, we calculate the number of Agricultural Field Officers (AFOs) in each bank. According to Table-2, AFOs make up 35% of all vacant posts.

For Bank C, the number of AFO posts is 35% of 600 = 0.35 × 600 = 210

For Bank E, the number of AFO posts is 35% of 450 = 0.35 × 450 = 157.5

For Bank D, the number of AFO posts is 35% of 820 = 0.35 × 820 = 287

For Bank F, the number of AFO posts is 35% of 560 = 0.35 × 560 = 196

The number of AFOs in Banks C and E together = 210 + 157.5 = 367.5

The number of AFOs in Banks D and F together = 287 + 196 = 483

To make it easier, let's multiply both sides by 10 to get rid of the decimal:

The ratio becomes 3675:4830. To simplify it, we find the greatest common divisor (GCD) which is 165. So, we divide both numbers by the GCD:

3675 / 165 = 35

4830 / 165 = 46

Therefore, the correct ratio of recruitment of AFOs in C and E taken together with that of D and F taken together is 35:46.

According to Table-2, Probationary Officers (POs) make up 10% of all vacant posts.

Let's calculate the number of POs initially required in Banks D and F:

For Bank D, the number of PO posts is 10% of 820 = 0.10 × 820 = 82

For Bank F, the number of PO posts is 10% of 560 = 0.10 × 560 = 56

Now, both banks hire 15% more POs than their requirement:

In Bank D, the number of hired POs is 115% of 82 = 1.15 × 82 = 94.3

In Bank F, the number of hired POs is 115% of 56 = 1.15 × 56 = 64.4

After one year, the total strength of the staff in both banks was brought down to the original strength through retrenchment. This means the excess of 15% staff were retrenched in both banks:

In Bank D, the number of retrenched employees is 94.3 - 82 = 12.3

In Bank F, the number of retrenched employees is 64.4 - 56 = 8.4

We are asked to find out by what percent is the retrenchment less/more in Bank D than in Bank F:

The difference in retrenchment between Banks D and F is 12.3 - 8.4 = 3.9

The percentage difference is (Difference / Number of retrenched employees in Bank F) × 100

The percentage difference is (3.9 / 8.4) × 100 = 46.43%

Therefore, the retrenchment is 46.43% more in Bank D than in Bank F.

First, let's calculate the current number of Technical Officers (TOs) and Finance Executives (FEs) in Bank E.

According to Table-2:

• TOs make up 8% of all vacant posts.

• FEs make up 26% of all vacant posts.

So, for Bank E:

• The number of TO posts is 8% of 450 = 0.08 × 450 = 36

• The number of FE posts is 26% of 450 = 0.26 × 450 = 117

For the ratio of the number of TOs to FEs to become 2:3, this means that the number of TOs needs to be two-thirds the number of FEs. Let's solve for the required number of TOs:

2/3 * number of FEs = 2/3 × 117 = 78

The additional TOs required for this would be:

Additional TOs = Required number of TOs - Current number of TOs = 78 - 36 = 42

Therefore, Bank E should employ 42 more TOs than the current required number for the ratio of the number of TOs to that of the number of FEs to become 2:3.

Key Points

 The best statement that describes the brainstorming method of teaching is 1) Production of many ideas.

Brainstorming:

• Brainstorming is a method of teaching that involves generating many ideas or solutions to a specific problem or question. It encourages participants to think creatively and freely without judgment or criticism. The goal is to generate as many ideas as possible, regardless of their feasibility or practicality.
• The brainstorming method of teaching encourages students to think creatively and come up with as many ideas as possible, without fear of judgment. This can be a great way to generate new ideas for projects, assignments, or even just for fun.
• During a brainstorming session, participants are encouraged to share their ideas openly and without hesitation. The facilitator of the session creates a supportive and non-threatening environment where everyone feels comfortable expressing their thoughts. This approach helps to foster a sense of collaboration and encourages active participation from all individuals involved.
• The brainstorming process typically involves a group of participants engaging in theme-based interaction. They discuss and build upon each other's ideas, sparking new thoughts and perspectives. The focus is on quantity rather than quality at this stage, as the aim is to generate a wide range of ideas.
• After the brainstorming session, the ideas are typically collected and evaluated. Depending on the context, this evaluation can be done individually or as a group. The collected ideas can then be refined, selected, and further developed.
• Overall, the brainstorming method of teaching promotes creativity, critical thinking, and collaboration among participants. It encourages the exploration of diverse perspectives and helps generate innovative solutions to problems.

Additional Information The other statements do not accurately describe the brainstorming teaching method.

2) Small-step presentation with feedback provided: 

• This is more of a lecture or tutorial description. In brainstorming, there is no set structure or order to the ideas that are generated.

3) Content delivery in a lucid language:

• This is a general description of any teaching method. Brainstorming does not necessarily involve the delivery of content and does not require lucid language.

4) Theme-based interaction among participants:

• This is more of a description of a discussion or a debate. Brainstorming can involve discussion, but it is not its primary focus. Brainstorming aims to generate as many ideas as possible, not to discuss them in detail.

Key Points 

The correct answer is 3) B and D only.

Learner-Centred Approach:

• A learner-centred approach is a teaching method that focuses on the needs and interests of the learner.
• It is based on the belief that students learn best when they are actively engaged in the learning process and when they have a say in what they are learning.

Here are some of the main characteristics of a learner-centred approach:

• Cooperative determination of subject matter:
• ​ The learner-centred approach emphasizes the importance of students having a say in their learning. Students are encouraged to work with their teachers to determine the topics that will be studied and the activities used to learn them.
• Emphasis on exposure variability:
• The learner-centred approach recognizes that students learn in different ways and at different paces. It emphasizes the importance of providing students with a variety of learning experiences so that they can find the methods that work best for them.
• The learner-centred approach is not based on a rigid curriculum.
• ​ Instead, it is based on the needs and interests of the learner. This means that the curriculum may vary from student to student.
• The learner-centred approach is also not centred on teacher needs.
• ​ Instead, it is centred on the needs of the learner. This means the teacher's role is to facilitate learning, not deliver content.

The learner-centred approach is a student-focused approach to teaching and learning. It emphasizes the importance of active engagement, collaboration, and exposure variability.

Key Points 

Statement I states that in focus group discussions, the moderator is supposed to provide a liberal climate for participants to open up.

• In focus group discussions, the role of the moderator is to create an open and permissive environment where participants feel comfortable expressing their opinions, thoughts, and experiences.
• The moderator should encourage active participation, ensure all participants have an equal opportunity to speak and establish a non-judgmental atmosphere.

This statement is true. 

Statement II states that participants of focus group discussions should rant individual experiences for comparison.

• While participants in focus group discussions share their experiences, the purpose is not to rant or engage in complaining or excessive negativity.
• The goal is to facilitate a constructive and insightful discussion where participants can share their perspectives, insights, and personal experiences related to the topic of discussion.
• The aim is to gather qualitative data, explore different viewpoints, and generate meaningful insights through group interaction.

This statement is false.

Therefore, the correct answer is option 3) Statement I is true, but Statement II is false.

Key Points The answer is 3) Description.

Denotation:

• Denotation is the literal meaning of a word or phrase. It is the dictionary definition of a word.
• Denotation is important in communication because it allows people to share information and ideas clearly and unambiguously.

Contrast, belief, and dissent are all important concepts in communication, but they are not the same as denotation.

• Contrast is the comparison of two or more things in order to highlight their differences.
• Belief is an acceptance that something is true, even without proof.
• Dissent is disagreement or opposition to a particular idea or course of action.

Here are some examples of denotation in communication:

• The word "dog" denotes a four-legged, furry animal that is often kept as a pet.
• The phrase "the sky is blue" denotes that the sky appears blue due to how sunlight interacts with the atmosphere.
• The sentence "I am a student" denotes the fact that the speaker is enrolled in a school or educational institution.

Denotation is an important part of communication because it allows people to share information and ideas in a clear and unambiguous way.

By understanding the denotation of words and phrases, people can communicate more effectively and avoid misunderstandings.

Given:

Rs. 8500 becomes Rs. 9500 in 3 years' time at simple interest

Concept used:

• (P × t × r)/100 = simple interest, where P = principal, t = times and r = rate of interest

Calculation:

In 3 years, 8500 becomes 9500, so interest = (9500 - 8500) = 1000

Now, (8500 × 3 × r)/100 = 10000

⇒ r = (1000 × 100/(8500 × 3) = 200/51

So, total interest on  Rs. 10,200 for 5 years will be

⇒ \(\frac{10200 \times 5\times \frac{200}{51}}{100}\) 

⇒ 200000/100 = 2000

So, after 5 year the amount becomes (10200 + 2000) = 12200

∴ The correct answer is 12200

Key Points 

The logical fallacy committed in the above argument is begging the question.

Begging the Question:

• Begging the question is a type of circular reasoning in which the conclusion of an argument is assumed in the premises.
• In this case, the argument assumes that opposition to Freudian theory is caused by unconscious resistance arising from the Oedipus complex.
• However, this is the very thing that the argument is trying to prove. Therefore, the argument begs the question.

The other options are incorrect.

Here is a breakdown of the four fallacies:

• Appeal to authority: 
• This fallacy occurs when an argument is made based on the authority of someone who is not an expert on the topic at hand.
• For example, if someone argues that a particular medical treatment is effective because a famous actor endorses it, they are committing the appeal to authority fallacy.
• Slippery slope: 
• This fallacy occurs when it is argued that small action will lead to a series of events that will eventually result in a negative outcome.
• For example, if someone argues that if we legalize marijuana, it will lead to the legalization of all drugs, they are committing the slippery slope fallacy.
• Begging the question: 
• This fallacy occurs when an argument is made in which the conclusion is assumed in the premises.
• For example, if someone argues that God exists because the Bible says so, they are committing the begging-the-question fallacy.
• Hasty generalization:
• This fallacy occurs when a conclusion is made about a group of people based on small sample size.
• For example, if someone argues that all politicians are corrupt because they have met a few corrupt politicians, they are committing the hasty generalization fallacy.

Key Points 

• The proposition "Some attorneys are logicians" means that there exists at least one attorney who is also a logician.
• This means that the set of attorneys is a subset of the set of logicians.
• Therefore, some logicians must be attorneys. This is equivalent to proposition 3.
• Proposition 1 is not logically equivalent because it says that there exist logicians who are not attorneys. This is not necessarily true, as it is possible that all logicians are also attorneys.
• Proposition 2 is not logically equivalent because it says that some attorneys are not logicians. This is not necessarily true, as it is possible that all attorneys are also logicians.
• Proposition 4 is not logically equivalent because it says that some non-logicians are not attorneys. This is not necessarily true, as it is possible that some non-logicians are also attorneys.

The correct answer is Based on the "intelligent" web where applications use natural language processing.

Key Points Web 3.0

• Web 3.0, often referred to as the "semantic web," is an evolution of the World Wide Web that aims to make information more easily understandable and accessible by both humans and machines.
• While natural language processing (NLP) plays a role in Web 3.0, it is not the sole foundation of this new web paradigm.
• In Web 3.0, the focus is on organizing and structuring data in a way that enables machines to better understand its meaning and context.
• This is achieved through the use of standardized formats and protocols, such as the Resource Description Framework (RDF), which provides a framework for representing information about resources on the web in a machine-readable format.
• NLP is one of the technologies used in Web 3.0 to facilitate the understanding of natural language by machines.
• It allows applications to analyze and interpret human language, enabling tasks such as sentiment analysis, language translation, information extraction, and question-answering systems.
• NLP is employed to extract meaning from unstructured text data and make it available in a structured format that can be processed and utilized by other applications.

The correct answer is A only.

Key Points The correct statement from the options given is:

A. In an email system, Bcc: allows the sender of a message to conceal the recipient entered in the Bcc: field from the other recipients.

Explanation:

A. This statement is true. In an email system, Bcc (Blind Carbon Copy) allows the sender to include recipients in the Bcc field without revealing their identities to the other recipients of the email. This is commonly used when the sender wants to keep certain recipients' email addresses private.

B. This statement is false. Phishing is not a malicious program installed on a system. Phishing refers to the act of attempting to deceive individuals into providing sensitive information, such as passwords or credit card details, by pretending to be a trustworthy entity. It is typically carried out through deceptive emails, websites, or messages.

C. This statement is also false. Spamming refers to the mass sending of unsolicited and often unwanted emails. It is generally done for commercial purposes, such as advertising products or services. While some spam emails may contain phishing attempts, spamming itself is not specifically focused on acquiring sensitive information or masquerading as a trustworthy entity.

Therefore, the correct answer is A only.

The correct answer is Statement I is false but Statement II is true.

Key Points Statement I: Mainframe computers have smaller internal memories than desktop computers.

Statement I: This statement is generally false. Mainframe computers typically have much larger internal memories (RAM) than desktop computers. Mainframes are designed to handle large-scale processing and often have extensive memory capabilities to support multiple concurrent users and large data sets. Desktop computers, while capable of running various applications, usually have smaller internal memory capacities compared to mainframes.

Statement II: Spreadsheets and word processors are examples of application software.

Statement II: This statement is true. Spreadsheets and word processors are examples of application software. Application software refers to programs designed to perform specific tasks or applications for end-users. Spreadsheets (e.g., Microsoft Excel, Google Sheets) are used for organizing and manipulating data in a tabular format, while word processors (e.g., Microsoft Word, Google Docs) are used for creating and editing documents.

Therefore, the correct answer is:

Statement I: False

Statement II: True

The correct answer is B and C only.

Key Points The correct answer is:

B. The internet is a group of interconnected networks.

C. An extranet is an internal network that can be accessed externally by authorized users.

Explanation:

• B. This statement is true. The internet is a global network of interconnected computer networks. It is a vast infrastructure that connects millions of devices worldwide, enabling communication and information exchange between them. The internet is not owned or controlled by a single entity and is composed of numerous interconnected networks.
• C. This statement is also true. An extranet is a private network that allows authorized external users to access it. It is an extension of an organization's internal network, providing limited access to specific resources or information for external parties such as business partners, suppliers, or customers. These authorized external users can connect to the extranet securely and access the permitted resources or collaborate with the organization.

Therefore, the correct answer is B. The internet is a group of interconnected networks.

C. An extranet is an internal network that can be accessed externally by authorized users.

The correct answer is A, B and D only.

Key Points

The correct answer is:

A. Jeevan Kaushal

B. Deeksharambh

D. Guru Dakshata

Explanation:

The University Grants Commission (UGC) has initiated several programs for the promotion of values and ethical practices in higher education institutions. The programs mentioned in the options are:

• A. Jeevan Kaushal: Jeevan Kaushal is a UGC program that focuses on imparting life skills education to students. It aims to enhance their employability, social skills, and ethical values.
• B. Deeksharambh: Deeksharambh is a UGC program that aims to orient and guide students in their early days of college. It focuses on promoting academic and personal values, helping students adapt to the college environment, and facilitating their holistic development.
• D. Guru Dakshata: Guru Dakshata is a UGC initiative that emphasizes recognizing and rewarding the efforts of teachers in higher education. It aims to promote ethical practices, dedication, and commitment among teachers and encourage them to enhance the quality of education.

The other options mentioned, C. Vishwa Bharat and E. Vishwa Darshan, are not specific programs initiated by UGC for the promotion of values and ethical practices.

Therefore, the correct answer is A. Jeevan Kaushal, B. Deeksharambh, and D. Guru Dakshata as the specific programs initiated by UGC for the promotion of values and ethical practices.​

Key Points 

Statement I states that in ancient India, education was free.

• Statement I is correct because in ancient India, education was not a commercial enterprise.
• It was seen as a sacred duty of the teacher to impart knowledge to the students. The students were not charged any fees for their education.

Statement II: In ancient India, education was centralised.

• Statement II is incorrect because in ancient India, education was not centralized.
• There were many different schools and teachers, each with their own curriculum and methods of teaching.
• The students were free to choose the school and teacher that best suited their needs.

Here are some additional details about the education system in ancient India:

• Education was compulsory for all children, regardless of their caste or social status.
• The curriculum included the Vedas, Upanishads, and other religious texts, as well as subjects such as mathematics, science, and philosophy.
• The teachers were highly respected members of society, and their students were expected to show them great deference.
• Education was seen as a way to improve one's character and to prepare oneself for a life of service to others.
• The education system in ancient India was very different from the education system in the modern world. However, it still has some important lessons to teach us.
• For example, it shows us that education can be free and accessible to everyone, regardless of their social status. It also shows us that education is not just about accumulating knowledge, but also about developing one's character and preparing oneself for a life of service to others.

The most appropriate answer is 3) Statement I is correct but Statement II is incorrect.

Key Points Summative Evaluation:

• Summative evaluation is a type of evaluation that is conducted at the end of a learning period or program.
• It assesses students' learning and whether they have met the established learning goals.
• It evaluates the effectiveness of a learning program or provides a final grade for a student's performance.

Summative evaluation is typically conducted through a variety of methods, such as:

• Exams: Exams are a common way to assess student learning. Exams can be written, oral, or performance-based.
• Projects: Projects are another common way to assess student learning. Projects can be individual or group projects and can be research-based, creative, or practical.
• Portfolios: Portfolios are a collection of student work demonstrating their learning over time. Portfolios can be compiled by students or by teachers.
• Other methods: Other summative evaluation methods can include teacher observations, student self-assessments, and peer assessments.

The results of the summative evaluation can be used to:

• Provide feedback to students: Summative evaluation results can be used to provide feedback about their learning. This feedback can help students identify their strengths and weaknesses and help them set improvement goals.
• Improve the learning program: Summative evaluation results can be used to improve the learning program. This can be done by identifying areas where the program is effective and can be improved.
• Make decisions about student placement: Summative evaluation results can be used to decide on student placement. This can be done by identifying students who are ready for the next level of instruction and students who need additional support.
• Make decisions about program funding: Summative evaluation results can be used to make decisions about program funding. This can be done by identifying programs that are effective and programs that need to be improved.

Summative evaluation is an important part of the learning process. It provides student feedback, helps improve the learning program, and makes decisions about student placement and program funding.

Additional Information The other statements are not as accurate descriptions of summative evaluation.

1) The teacher clarifies the doubts of the students in the class itself.

• This is an example of formative evaluation conducted throughout the learning period to provide feedback to students and teachers.

3) During interaction with students in the classroom, the teacher provides feedback.

• This is also an example of formative evaluation.

4) The learner's motivation is raised by the teacher through a question-answer session during the class.

• This is an example of instructional strategy, not evaluation.

Hence, The correct answer is 2) A teacher awards grades to the students after having transacted the course work.

Key Points The answer is 1) Positively skewed.

Normal Distribution:

• A normal distribution is a symmetrical distribution, meaning that the mean, median, and mode are all the same.

Positively skewed distribution:

• A positively skewed distribution, also known as a right-skewed distribution, is one where the mean is greater than the median and mode.
• This means that the tail of the distribution is longer on the right side, with more data points occurring at higher values.

Here is a diagram of a positively skewed distribution:

• As you can see, the tail of the distribution is longer on the right side, with more data points occurring at higher values. This is in contrast to a normal distribution with a bell-shaped curve.

Some examples of positively skewed distributions include:

Income distribution:

• In most societies, there are a few people with very high incomes and many with lower incomes. This results in a positively skewed distribution, with the mean being greater than the median and mode.

Test scores:

• In many cases, test scores are positively skewed. This is because there are a small number of people who score very high on tests and a large number of people who score lower.

Heights:

• Heights are also positively skewed. This is because there are a few very tall people and many shorter people.

Key Points 

• Threats to internal validity in research are factors or influences that can introduce bias or confounding effects, potentially impacting the validity of the study's results.

The Threats to internal validity

• Attrition:
• Attrition refers to the loss of participants or dropout from a study over time.
• It can affect internal validity by creating a non-random sample or introducing selection bias if the attrition is related to the studied variables.
• If the individuals who drop out have different characteristics or experiences compared to those who remain, it can affect the study's internal validity.
• History:
• ​History refers to events or changes occurring during the course of a study that are unrelated to the independent variable but can influence the dependent variable. T
• hese external events can confound the results and threaten the study's internal validity.
• Maturation:
• ​Maturation refers to natural changes or developments that occur within individuals over time.
• It can affect internal validity if the observed changes in the dependent variable are not due to the independent variable but rather to the participants' maturation process.

Therefore, options C, D, and E correctly identify some threats to internal validity in research.

Symbol representation:

According to the given information, family tree is as follow;

Hence, the person "X" is daughter of the "man".

Given: 55, 47, 74, 10, 135, -81, 262, ?  

Logic: There is alternative subtraction and addition of cube of continuous numbers, starting form 2.

Hence, the missing term will be "-250".

The correct answer is Engines in which biofuels and gasoline can be put in any ratio.

Key PointsFlex fuel Engines: 

• Flex fuel engines are designed to be compatible with a wide range of fuel blends, typically including gasoline and ethanol. This flexibility allows vehicles equipped with flex fuel engines to use varying combinations of gasoline and ethanol, such as E85 (a blend of 85% ethanol and 15% gasoline), as well as other biofuel-gasoline blends.
• Flex fuel engines are equipped with sensors and control systems that can adjust the fuel-air mixture and ignition timing based on the specific blend of fuel being used.
• This adaptability enables vehicles to optimize their performance and efficiency while using different fuel compositions.
• Flex fuel engines offer several advantages, including the potential for reduced greenhouse gas emissions, increased energy security by diversifying fuel sources, and support for the use of renewable and domestically produced biofuels.
• However, it's important to note that the availability of different fuel blends may vary depending on the region and fuel infrastructure.

Hence, the correct answer is Engines in which biofuels and gasoline can be put in any ratio.

Key Points 

Statement I defines technical education as emphasizing the learning of techniques, technical procedures, and necessary skills, with the aim of preparing technicians typically above the secondary level.

This statement is true.

• Technical education focuses on providing practical knowledge, skills, and training in specific technical areas, such as engineering, technology, or applied sciences.
• It aims to develop individuals who can contribute as technicians or skilled professionals in various industries or sectors.

Statement II states that there is no distinction between vocational education, industrial education, and technical education.

This statement is false.

• While there may be some overlap or similarities between these terms, there are distinct differences in their scope and focus.
• Vocational education
• ​It  typically refers to education and training that prepares individuals for specific occupations or trades. It focuses on developing practical skills and knowledge directly related to specific job roles or industries.
• Industrial education
• It often refers to educational programs that provide training and skills related to industrial or manufacturing processes and technologies.
• Technical education,

As mentioned in Statement I, has a broader scope and emphasizes the learning of techniques, technical procedures, and necessary skills across various technical fields or disciplines.

Therefore, Statement I is true in defining technical education, but Statement II is false as there are distinctions between vocational education, industrial education, and technical education.

Key PointsThe Indian Council of Agricultural Research (ICAR): 

• The Indian Council of Agricultural Research (ICAR) is the apex body for agricultural research in India. It was established in 1929 by the Government of India. ICAR has a network of over 100 institutes and centers spread across the country.
• These institutes and centers conduct research on a wide range of agricultural topics, including crop production, animal husbandry, fisheries, and forestry.

The Indian Institute of Food Technology (IIFT):

• The Indian Institute of Food Technology (IIFT) is a premier institute of food science and technology in India.
• It was established in 1963 by the Government of India. IIFT offers undergraduate, postgraduate, and doctoral programs in food science and technology.

The Indian Diary Research Institute (IDR):

• Indian Diary Research Institute (IDR) is a national research institute for dairy science and technology in India.
• It was established in 1955 by the Government of India. IDR conducts research on a wide range of dairy topics, including milk production, processing, and marketing.

The Central Agricultural Marketing Department (CAMD):

• The Central Agricultural Marketing Department (CAMD) is a department of the Ministry of Agriculture and Farmers Welfare, Government of India.
• CAMD is responsible for promoting and regulating agricultural marketing in India. CAMD provides a number of services to farmers and traders, including market intelligence, market research, and market linkages.

Therefore, the institutes of agricultural research that are included in the options are A, B, C, and D.

Key Points 

The correct answer is: the Hawthorne effect

Hawthorne effect:

• The Hawthorne effect refers to a change in behaviour or performance that occurs in individuals when they are aware that they are being observed or are participating in a research project.
• It is named after a series of studies conducted at the Western Electric Hawthorne Works in Chicago during the 1920s and 1930s.
• During these studies, researchers found that workers' productivity improved not solely due to changes in working conditions or interventions but also because they were aware they were being observed. This awareness of being studied and the belief that their performance was being monitored led to changes in behaviour, motivation, and productivity.
• The Hawthorne effect can manifest in various ways.
• For example, individuals may work harder, be more cooperative, or exhibit better performance simply because they know they are being observed or are part of a research study. The effect can be influenced by factors such as increased attention, motivation to impress or comply with expectations, or the desire to conform to perceived norms.
• It is important to be aware of the Hawthorne effect when conducting research, as it can impact the validity and generalizability of study results.
• Researchers must consider the potential for participants to alter their behaviour due to the awareness of being observed and take steps to minimize or account for this effect in their study design and data analysis.

Additional Information Here is the explanations for the other options:

Blind effect:

• There is no widely recognized term or concept called the "Blind effect" in the context of research or behaviour change. It does not correspond to any specific phenomenon or effect.

Evaluation effect:

• The term "Evaluation effect" is not commonly used in research or behavioural sciences. It does not represent a recognized phenomenon or effect related to changes in behaviour due to awareness of participation in a research project.

Demand effect:

• The Demand effect, also known as the Demand characteristics, refers to the tendency of participants in a research study to alter their behaviour or responses to align with the perceived expectations or demands of the study.
• Participants may consciously or unconsciously modify their behaviour, responses, or performance to match what they believe the researcher wants or expects.

Key Points Symbols:

• Symbols are often used to represent specific concepts or ideas within a particular culture.
• For example, the cross is a symbol of Christianity, the Star of David is a symbol of Judaism, and the crescent moon and star is a symbol of Islam.
• These symbols are only meaningful within the context of their respective cultures.
• In other words, a symbol does not have any inherent meaning. Its meaning is derived from how it is used within a particular culture. For example, the cross may be seen as a symbol of death or suffering in some cultures but as a symbol of hope and salvation in Christian culture.
• Using symbols in a specific cultural context can help convey meaning in a way that would not be possible with words alone.
• Symbols can also create a sense of community or shared identity among members of a particular culture.

Here are some examples of how symbols are used in specific cultural contexts:

• The American flag symbolises patriotism and national identity in the United States.
• The Chinese dragon is a symbol of power and strength in Chinese culture.
• The Japanese cherry blossom symbolises beauty and fragility in Japanese culture.

Symbols can be used in a variety of ways, including:

• To represent concepts or ideas
• To create a sense of community or shared identity
• To convey meaning in a way that would not be possible with words alone

Hence, Symbols provide meaning when used in a Specific cultural context.

Key Points 

The correct answer is 2) B, C and D only.

Hot Medium:

• A hot medium is a type of medium that provides a lot of information and requires little audience participation. It is characterized by:
• Low audience participation: The audience is not required to do much to understand the medium. For example, a movie is a hot medium because the audience simply sits back and watches.
• Large amounts of information: Hot media provide a lot of information. For example, a movie can contain a lot of plot, character development, and action.
• Envelopes only one sense: Hot media typically only engage one sense. For example, a movie engages the sense of sight.
• Hot media are often contrasted with cool media, which are characterized by high audience participation and low information density.
• For example, a book is a cool medium because the reader must actively participate in the reading process.

The following are not characteristics of hot media:

• Non-mechanical components: Hot media can be mechanical or non-mechanical. For example, a movie is a hot medium, even though it is a mechanical medium.
• High audience participation: Hot media typically have low audience participation.

Key Points 

Statement I states that in the initial stages, mass communication was considered as a study of propaganda.

• In the early days of mass communication research, the focus was primarily Ion understanding the persuasive and manipulative aspects of mass media, including propaganda techniques.
• The study of mass communication initially emphasized the role of media in shaping public opinion and influencing behaviours.

Hence, this statement is true. 

Statement II states that now mass communication has its linguistic component in terms of signs, codes, and language.

• Over time, the field of mass communication has evolved and expanded to encompass various aspects, including the analysis of signs, codes, and language used in communication processes.
• communication scholars now study how meaning is conveyed, interpreted, and understood through signs, symbols, language, and other semiotic systems in media messages.

This statement is also true.

Therefore, the correct answer is option 1) Both Statement I and Statement II are true.

Key Points 

The proposition that "No frogs are amphibians" is false means that there exists at least one frog that is an amphibian.

Let's start by breaking down the proposition.

• "No frogs are amphibians" into its component parts. The word "no" means that there are no members of the set "frogs" that are also members of the set "amphibians." In other words, the intersection of the sets "frogs" and "amphibians" is empty.
• Now, let's say that this proposition is false. This means that at least one member of the set "frogs" must also be a member of the set "amphibians." In other words, the intersection of the sets "frogs" and "amphibians" is not empty.
• This means we can immediately infer that 2) Some frogs are amphibians is true.
• The other propositions are not necessarily true.
• For example, just because at least one frog exists that is an amphibian, it does not mean that all frogs are amphibians. It is also possible that there exist non-frogs that are amphibians.

Let's look at the other propositions in more detail.

1) Some non-amphibians are not non-frogs. This proposition is not necessarily true. For example, a fish is a non-amphibian, and a fish is also a non-frog. Therefore, a non-amphibian can be a non-frog.

3) All frogs are amphibians. This proposition is also not necessarily true. For example, there may exist frogs that are not amphibians. For example, a frog that has been genetically modified not to have the ability to breathe water would not be an amphibian.

4) Some frogs are not amphibians. This proposition is not necessarily true. For example, we have already established that it is possible for a frog to be an amphibian. Therefore, a frog can be an amphibian; therefore, it is not necessarily true that some frogs are not amphibians.

Therefore, the only proposition that can be immediately inferred to be true is 2) Some frogs are amphibians

The correct answer is  A, C and D only.

Key Points

A. Inhalation:

Inhalation is a common pathway for toxicants to enter our body. When we breathe in toxic substances in the form of gases, vapors, dust, or particles present in the air, they can enter our respiratory system. The toxicants can then be absorbed into the bloodstream through the lungs. Inhalation exposure commonly occurs in occupational settings where workers are exposed to airborne contaminants, but it can also happen in various other environments. The respiratory system provides a direct pathway for toxic substances to reach the bloodstream and potentially cause adverse effects.

C. Dermal:

Dermal exposure is another pathway for toxicants to enter our body. The skin is the largest organ of the body and can absorb certain chemicals and substances. When toxic substances come into direct contact with the skin or are present on the skin's surface, they can penetrate through the skin's layers and enter the bloodstream. This route of exposure can occur through contact with liquids, powders, contaminated surfaces, or prolonged exposure to certain substances. Some toxicants can cause irritation, sensitization, or systemic effects when absorbed through the skin.

D. Ingestion:

Ingestion refers to the intake of toxicants through the mouth by swallowing. When we consume contaminated food, water, beverages, or other substances, toxicants present in them can enter our gastrointestinal tract. In the gastrointestinal tract, the toxicants can be absorbed through the walls of the stomach or intestines and enter the bloodstream. This pathway is particularly relevant for chemicals and substances that are orally toxic, such as certain pesticides, heavy metals, or contaminated food and drinks. Ingested toxicants can have systemic effects on various organs and systems in the body.

In summary, the correct pathways for toxicants to enter our body are A. Inhalation, C. Dermal, and D. Ingestion. Inhalation involves breathing in toxic substances that enter the respiratory system, dermal exposure occurs through contact with the skin, and ingestion happens through swallowing contaminated substances. These pathways highlight how toxicants can enter our body and potentially cause adverse effects on our health.

Key Points 

The propositions that are so related that if one of them is true, the other has to be false, and vice versa, are:

B) Some camels are herbivorous.

D) No camels are herbivorous.

• If proposition B is true, it means that there are at least some camels that are herbivorous.
• In this case, proposition D, which states that no camels are herbivorous, must be false because proposition B contradicts it.
• Conversely, if proposition D is true, it means that no camels are herbivorous.
• In this case, proposition B, which states that some camels are herbivorous, must be false because proposition D contradicts it.
• Propositions A and C are not directly related to each other and can be independently true or false.

Therefore, the correct answer is option 2) B and D only.

Key Points 

• According to the Intergovernmental Panel on Climate Change (IPCC), the world needs to reduce greenhouse gas emissions by 45% by 2030 and reach net-zero emissions by 2050 in order to limit global warming to 1.5°C above pre-industrial levels.
• This is a challenging but achievable goal, and it will require a concerted effort from governments, businesses, and individuals around the world.

Here are some of the things that can be done to reduce greenhouse gas emissions:

• Increase the use of renewable energy sources, such as solar and wind power.
• Improve energy efficiency in homes, businesses, and transportation.
• Shift to more sustainable agricultural practices.
• Protect forests and other natural ecosystems.

By taking these steps, we can reduce greenhouse gas emissions and help to protect our planet for future generations.

Hence.the answer is 45.

The correct answer is '1) Britain'.

Key Points

• The passage mentions a secret agreement between Britain and France in 1904.
• According to this agreement, Britain was given a free hand in Egypt.

There is no mention of any other European power being allowed to take control of Egypt.

Therefore, the correct answer is Option 1.

The correct answer is '2) Both Statement I and Statement II are incorrect'.

Key Points

• The passage suggests that competing claims over African colonies were generally settled in the conference rooms of Europe and wars were avoided.
• This contradicts Statement I, which suggests that these claims were generally settled through war.
• Statement II suggests that France was only in conflict with Britain over Morocco.
• However, the passage mentions that Germany also had a conflict with France over Morocco, demanding that France relinquish her claim to the territory.

Therefore, the correct answer is Option 2.

The correct answer is '2) France'.

Key Points

• According to the passage, Britain and France made an agreement in 1904. In this agreement, France was to receive Morocco in exchange for giving Britain a free hand in Egypt.
• Later, when Germany demanded France to relinquish her claim on Morocco, France agreed to give a portion of French Congo to Germany in return for Germany allowing France to have control over Morocco.

Hence, it is clear that France was allowed to establish a colony in Morocco.

Therefore, the correct answer is Option 2.

The correct answer is '2) A, B and C only'.

Key Points

• The passage clearly states that Britain, France, and Germany were involved in the tussle over Morocco.
• Germany demanded France to relinquish her claim on Morocco after it learned about the secret agreement between Britain and France.

There is no mention of Spain being involved in any way in the dispute over Morocco.

Therefore, the correct answer is Option 2.

The correct answer is '2) Both Statement I and Statement II are incorrect'.

Key Points

• The passage mentions that France agreed to give a portion of French Congo to Germany, not full control as Statement I suggests.
• The passage doesn't mention that France went to war with Britain in 1904, but rather, they entered into an agreement. This contradicts Statement II which suggests that France and Britain went to war in 1904.

Therefore, the correct answer is Option 2.

Key Points 

The correct answer is 2) Test-retest reliability.

Test-retest Reliability:

• Test-retest reliability is a measure used to assess the consistency or stability of data collected over different points in time.
• It is calculated by administering the same test to the same group of people at two different points in time and then comparing the scores.
• A high test-retest reliability indicates that the test is measuring something stable over time.
• The aim of test-retest reliability is to evaluate whether the results of a measurement or test remain consistent over time.
• If the data collected exhibit high test-retest reliability, the measurement is stable and produces consistent results across different testing sessions.
• For example, suppose a psychological test is administered to a group of participants, and they are retested with the same test after a certain period. In that case, the degree of consistency in their scores on both occasions determines the test-retest reliability of the measurement.

Additional Information Here is some of the other methods used to measure the consistency of data collected:

Inter-rater reliability:

• Inter-rater reliability refers to the consistency or agreement between raters or observers assessing or scoring the same data or behaviour. It assesses the level of agreement among raters in their judgments or ratings.

Split-half reliability:

• Split-half reliability is a measure used to assess the internal consistency of a measurement instrument. It involves splitting the items or questions of a test into two halves and comparing the scores obtained from each half to determine the degree of consistency or correlation between them.

Internal reliability:

• Internal reliability, also known as internal consistency, is a measure used to assess the extent to which the items or questions within a measurement instrument are consistent or measure the same construct. It is typically evaluated using statistical techniques such as Cronbach's alpha, which assesses the correlation between different items in the instrument.

The correct answer is B and C only.

Key Points B. Activating a burglar alarm:

When it comes to securing a building or property, burglar alarms play a crucial role. These alarms are designed to detect unauthorized entry or suspicious activities, and sensors are a vital component in their functioning. Various types of sensors are used in burglar alarm systems:

• Motion Sensors: These sensors use technologies like infrared or microwave to detect movement within a specific range. When the sensor detects motion, it triggers the burglar alarm system, alerting the occupants or security personnel.
• Door/Window Sensors: These sensors are placed on doors and windows to monitor their status. They consist of two parts: a magnet and a switch. When the door or window is closed, the magnet aligns with the switch, keeping it in a closed position. If the door or window is opened, the magnet moves away from the switch, triggering the alarm.
• Glass Break Sensors: Glass break sensors are designed to detect the sound or vibrations caused by the breaking of glass. They are particularly useful in securing areas with glass windows or doors. When the sensor picks up the characteristic sound or vibrations of glass breaking, it activates the alarm system.

These sensors work together to monitor the premises for any signs of unauthorized entry. When a sensor is triggered, it sends a signal to the central control panel of the burglar alarm system, which then activates the alarm, such as sounding a siren or sending an alert to the monitoring station or property owner.

C. Opening automatic doors:

Automatic doors are commonly found in various public places like shopping malls, hospitals, airports, and office buildings. These doors are equipped with sensors that detect the presence or movement of individuals and enable automatic opening. The types of sensors used in automatic doors include:

• Infrared Sensors: Infrared sensors emit infrared beams and detect when the beam is interrupted by a person or object. When someone approaches the door and crosses the path of the infrared beams, the sensor detects the interruption and signals the door to open.
• Motion Sensors: Motion sensors use technologies like microwave or passive infrared to detect motion within a specific range. When someone approaches the door, the motion sensor detects the movement and triggers the automatic door to open.
• Pressure Sensors: Pressure sensors are installed in the floor or mat in front of the door. When someone steps on the sensor or applies pressure to it, it detects the weight or pressure and signals the door to open.

These sensors provide a convenient and efficient way to open doors without requiring physical contact or manual operation. They enhance accessibility and improve the flow of people in busy environments.

Hence, the correct answer is B and C only.

Key Points 

The correct answer is 1) Both Statement I and Statement II are true.

Statement I: Mass communication supplies an inventory of public messages and allows for the monitoring of social values.

• Mass communication is the process of sending messages to a large audience through mass media, such as television, radio, newspapers, and the internet.
• Mass communication can be used to inform, persuade, or entertain the public.
• It can also be used to monitor social values. For example, mass communication can be used to track how public opinion changes on a particular issue.

This statement is true.

Statement II: In large-scale social settings, mass media will enable integration of social institutions.

• Mass media can play a role in integrating social institutions by providing a common forum for people to share information and ideas.
• For example, mass media can be used to discuss political issues, social problems, and cultural trends. This can help to create a sense of community and shared values.

This statement is also True.

Therefore,Both Statement I and Statement II are true.

Here are some examples of how mass communication can supply an inventory of public messages and allow for the monitoring of social values:

• Newspapers: Newspapers report on current events and issues, providing a way for people to stay informed about what is happening in their community and around the world.
• Television: Television shows and movies often reflect social values, providing a way for people to see how others think and feel about different issues.
• Radio: Radio broadcasts can be used to discuss current events, social problems, and cultural trends.
• The Internet: The Internet is a vast repository of information, allowing people to learn about different cultures, values, and perspectives.

Here are some examples of how mass media can enable integration of social institutions:

• Election campaigns: Mass media are often used to run election campaigns, providing a way for candidates to reach out to voters and share their message.
• Public service announcements: Mass media are often used to run public service announcements, which are messages that promote social welfare.
• Educational programming: Mass media are often used to produce educational programming, which can be used to teach people about different subjects.

According to the given direction, 

• A person starts from point A and walks 30 meters in the North direction and then 20 meters towards West and reaches a point B.

• he takes a southward turn and walks 10 meters to point C. After that, he turns eastward and covers 15 meters to reach point D.

• Finally, turning to his right he walks 20 meters.

From the above figure, starting point is 5 meters away from the ending point.

Hence, the correct answer is "5 meters".

Logic: Alphabets in the word written diagonally opposite in set of two alphabets.

TECHNOLOGY is written as 'ETHCONOLYG',

Similarly, GENERATION be written as;

Hence, the correct answer is "EGENARITNO".

Key Points Svarupasiddha fallacy:

• The Svarupasiddha fallacy, also known as the fallacy of misplaced concreteness or essentialist fallacy, occurs when an argument wrongly attributes a quality or characteristic to something based on a superficial or unrelated feature.
• It involves making an erroneous inference about the essence or nature of something based on external or irrelevant factors.

In the given options, the argument in option 3) "Sound is a quality because it is visible" is an example of the Svarupasiddha fallacy.

• This argument incorrectly assumes that sound is a quality or attribute because it is visible. However, sound is not visible but audible, as it is a form of vibration that travels through a medium, typically air. The argument confuses the sensory perception of sound with the visual perception of something else, leading to a fallacious conclusion.

Options 1), 2), and 4) do not demonstrate the Svarupasiddha fallacy:

• The argument in option 1) "The sky-lotus is fragrant because it is a lotus, like the lotus of a lake" does not exhibit the Svarupasiddha fallacy.
• It draws an analogy between the sky-lotus and the lotus of a lake to suggest that the sky-lotus shares the fragrant characteristic of a lotus.
• The argument in option 2) "Sound is eternal because it is produced" does not involve the Svarupasiddha fallacy.
• It asserts that sound is eternal based on the premise that it is produced. While the argument may have other fallacies, it does not relate to the Svarupasiddha fallacy.
• The argument in option 4) "Fire is cold because it is a substance" does not exemplify the Svarupasiddha fallacy.
• It suggests that fire is cold based on the premise that it is a substance. While the argument may be incorrect, it does not involve misattributing a characteristic based on an unrelated feature.

Therefore, the correct answer is option 3) Sound is a quality because it is visible.

Key Points State universities:

• State universities are established by the state governments of India.
• They are funded by the state governments and are subject to the laws and regulations of the state governments.
• State universities are generally located within the state in which they are established.

All three universitiesvrom given options are state universities in India.

• Sardar Patel University was established in 1950 in Vallabh Vidyanagar, Gujarat.
• Gauhati University was established in 1948 in Guwahati, Assam.
• Acharya Nagarjuna University was established in 1966 in Nagarjuna Nagar, Andhra Pradesh.

Central universities:

• Central universities are established by the central government of India.
• They are funded by the central government and are subject to the laws and regulations of the central government.
• universities are generally located in different states across India

Nagaland University and Sikkim University from the given options are central universities in India.

• Nagaland University was established in 1994 in Kohima, Nagaland.
• Sikkim University was established in 1996 in Gangtok, Sikkim.

Therefore, the correct answer is 3) A, C and D only

The correct answer is Both Statement I and Statement II are incorrect.

Key Points The most appropriate answer based on the given statements is:

Statement I: Rivers and lakes that have low biological productivity are said to be eutrophic.

Explanation:

Statement I: This statement is false. Eutrophication refers to a process in which bodies of water, such as rivers and lakes, become rich in nutrients, especially nitrogen and phosphorus. This excessive nutrient input leads to increased biological productivity, causing algal blooms and the depletion of oxygen in the water. Eutrophic waters are characterized by high nutrient content and can have negative ecological impacts.

Statement II: This statement is false. Oligotrophic refers to rivers and lakes that have low nutrient concentrations and, as a result, lower biological productivity. Oligotrophic waters tend to have clear water with low levels of organic materials and are typically considered to be in a more pristine state. They can support a limited number of organisms due to the scarcity of nutrients.

In light of the given statements, neither statement is correct. Both statements are reversed in terms of their definitions:

• Rivers and lakes that have low biological productivity and low nutrient concentrations are called oligotrophic.
• Rivers and lakes that are rich in organisms and organic materials due to high nutrient concentrations are referred to as eutrophic.

Therefore, the most appropriate answer is that neither statement is correct based on their given definitions.

The correct answer is UV-Radiations.

Key Points UV-Radiations

• While ozone is considered a pollutant in the lower atmosphere (troposphere) when it is present as a component of smog, it plays a valuable role in the stratosphere.
• The stratospheric ozone layer, often referred to as the ozone layer, is located approximately 10 to 50 kilometers above the Earth's surface.
• In the stratosphere, ozone performs a crucial function by absorbing and filtering out a significant portion of the Sun's ultraviolet (UV) radiation, particularly the harmful UV-B and UV-C rays.
• This absorption process prevents a large portion of these UV rays from reaching the Earth's surface.
• UV radiation is a form of electromagnetic radiation emitted by the Sun. While UV-A rays have relatively lower energy and can penetrate the atmosphere, UV-B and UV-C rays have higher energy and are more damaging to living organisms.
• Prolonged exposure to UV-B and UV-C radiation can lead to harmful effects on human health, including skin cancer, cataracts, immune system suppression, and damage to plants and ecosystems.
• The ozone layer acts as a natural shield, absorbing and filtering out a significant portion of the incoming UV-B and UV-C radiation. Ozone molecules in the stratosphere absorb the UV radiation, converting it into heat energy.
• This process prevents most of the harmful UV radiation from reaching the Earth's surface, providing protection for living organisms.

Hence, the correct answer is UV-Radiations.

Additional Information 

Gamma Rays:

Gamma rays are a form of high-energy electromagnetic radiation. They have the shortest wavelengths and the highest frequencies among the electromagnetic spectrum. Gamma rays are produced by nuclear reactions, such as radioactive decay or nuclear explosions. They are highly penetrating and can easily pass through most materials, including the human body. Due to their high energy, gamma rays can ionize atoms and cause significant damage to living cells. 

X-rays:

X-rays have shorter wavelengths and higher frequencies than visible light. They are produced when high-speed electrons collide with a metal target or when electrons undergo rapid deceleration. X-rays can penetrate certain materials, including soft tissues and organs in the human body, but are absorbed by denser materials like bones and metal. 

Infrared (IR) Radiation:

Infrared radiation, also known as IR radiation or heat radiation, has longer wavelengths and lower frequencies than visible light. It is emitted by objects and substances due to their thermal energy. Infrared radiation is invisible to the human eye but can be felt as heat.