DSSSB TGT Social Studies Female 14 Nov 2018 Official Paper (Shift 1) (Previous Year Paper)

Given:

Snehlata’s date of birth is 6.2.1990.

She has done her graduation and post-graduation in Commerce and secured 61% and 63% marks respectively. 

She has post-qualification work experience as a Senior Accountant of 3.5 years.

She has secured 58.5% marks in the selection process.

All conditions are as follows;

Snehlata fulfills all the given criteria for the recruitment process in an accounting organization.

So, She should be selected

Hence, the correct answer is "Should be selected".

The logic followed is:

All the options except option (1), are the correct pair of country and its capital whereas option 1 is incorrectly matched.

Thus we can see option 1 is incorrectly matched.

Hence, the correct answer is "Option 1".

Thus, the image that is formed after folding the paper is an image shown below,

Hence, the correct answer is "Option 4".

The logic followed is:

The first number is exactly divisible by the second number.

All the options except for option (3), the first number is exactly divisible by the second number.

Option 1: 9 - 3

9 is exactly divisible by 3.

Option 2: 8 - 4

8 is exactly divisible by 4.

Option 3: 10 - 3

10 is not exactly divisible by 3.

Option 4: 6 - 6

6 is exactly divisible by 6.

Hence, the correct answer is "10 - 3".

The logic followed is:

i) The outer small figure is moving inside the bigger figure.

ii) The figure which has moved inside the bigger figure is getting shaded.

Thus square will move inside the pentagon. The moved square will now become shaded.

Therefore only 1 image satisfying the given pattern is option 4

Complete series = 

Hence, the correct answer is "Option 4".

As we can see the given figure is embedded in Option 4. 

Hence, the correct answer is "Option 4".

The logic followed is:

A computer is a machine that can be programmed to carry out sequences of arithmetic or logical operations automatically. A computer system is a "complete" computer that includes the hardware, operating system (main software), and peripheral equipment needed and used for "full" operation.

Conventionally, a modern computer consists of at least one processing element, typically a central processing unit (CPU) in the form of a microprocessor, along with some type of computer memory, typically semiconductor memory chips. 

Thus we can say the microprocessor is the most crucial part of the computer. 

Option 1: Processor

Computer processor speed (CPU speed) is one of the most important elements to consider when comparing computers. The CPU is often referred to as “the brain” of your computer, so ensuring it’s working properly is very important to the longevity and functionality of your computer.

Option 2: Printer

It is not a compulsory element to be present in a computer for its normal function. Without it also a computer can run smoothly.

Option 3: Gaming consoles

It is not a compulsory element to be present in a computer for its normal function. Without it also a computer can run smoothly.

Option 4: CD/DVD player

It is not a compulsory element to be present in a computer for its normal function. Without it also a computer can run smoothly.

Hence, the correct answer is "Processor".

From the diagram given below:

The shaded part represents the persons who speak only two languages.

26 + 51 + 17

= 94 

Hence, the correct answer is "94".

The logic followed is:

Decoding the information, 

Given the equation:  (6 C 5) A (14 C 2) B 4 = ?

After replacing the signs from left to right and using the BODMAS rule,

(6 × 5) + (14 × 2) - 4 = ?

30 + 28 - 4 = ?

58 - 4 = ?

? = 54

Hence, the correct answer is "54".

Given:

The total age of Anjali, Ankitha, and Banu is 60 years.

Anjali + Ankita + Banu = 60 years

Four years ago each of them was 4 years younger.

So, a total of their ages four years ago = [60 – (3 × 4)] years

= 60 – 12

= 48 years

Hence, the correct answer is "48 years".

The logic followed is:

In all the other options except option (1), the given words are synonyms of each other.

Option 1: Unhappy : Pleasure

Given words are antonyms.

Option 2: Moist : Drench

Given words are synonyms.

Option 3: Wish : Desire

Given words are synonyms.

Option 4: Error : Blunder

Given words are synonyms.

Hence, the correct answer is "Option 1".

The pattern followed is:

The figure is rotating anticlockwise in each next step.

The complete series is:

Hence, the correct answer is "Option 2".

The family chart is as follows:

Drawing the family tree as per the given information:

Thus Ramu related to Sadhana as a cousin.

Hence, the correct answer is "Cousin".

The logic followed is:

i) Every figure has a single line outside it and parallel to one of the sides.

ii) Only option 1 satisfies the given conditions as the other 3 have lines inside the figures.

Option 1: 

The outside line is parallel to one of the sides which is similar to the common pattern.

Option 2: 

The lines are inside the given figure thus it is different from the common pattern.

Option 3: 

The lines are inside the given figure thus it is different from the common pattern.

Option 4: 

The lines are inside the given figure thus it is different from the common pattern.

Hence, the correct answer is "Option 1".

The pattern followed is:

Hence, the correct answer is "98".

The correct answer is Option 3: Bring the information to the notice of the mall authorities to take necessary action about the hygiene of their products.

• Qualities Projected in this situation:  (Sense of responsibility and speed of decision-making).

Key Points

• Checklist for attempting SRT questions:

1. Read the question and options carefully.
2. Look for options that are realistic, optimistic, and reflect officer-like qualities.
3. Do not skip any situation.
4. Relegate the negative sentences and choose the most logical option among the remaining. As time is an important factor, hence your thinking ability should be swift.
5. React quickly and be logical.

The logic followed is:

In all the figure except figure (D), the base of the semi circle is along with the line segment.

But 

In figure D semi circle is inverted and its base is away from the line segment.

Hence, the correct answer is "Option 4".

The pattern followed is:

Hence, the correct answer is "ED".

The logic followed is:

Thus we can see from the period of 2016 - 2017 the death rate due to dengue fever has increased 10 to 15.

Hence, the correct answer is "Option 4".

Given:

Score gain for every correct answer = 4

Score loss for every wrong answer = 1

Calculation:

Let the total number of correctly answered questions be x

So, the total number of incorrectly answered questions = 80 – x

For getting 4 marks for a correct answer and losing 1 mark for an incorrect answer, we get:

4x + [(80 – x) × (-1)] = 200

⇒ 4x - 80 + x = 200

⇒ 5x = 200 + 80

⇒ 5x = 280

⇒ x = 56

Hence, the correct answer is "56".

The correct answer is An office in the Cabinet Secretariat, Government of India.

Key Points

• The National Authority for Chemical Weapons Convention (NACWC) was set up as an office of the Cabinet Secretariat, Government of India.
• The National Authority will act as the “national focal point” for effective communication with organizations and other state parties on matters relating to the Convention and for fulfilling the obligations of the country.
• The Authority’s functions include regulation and monitoring the development, production, processing, consumption, transfer, or use of toxic chemicals or precursors as specified in the Chemical Weapons Convention Act, among others.
• The Authority is also empowered to issue directions and even close down facilities that violate the Convention.
• It can also collaborate with other countries to seek or give assistance and protection against the use of chemical weapons.
• The Central Government is vested with the power to constitute a necessary Committee to overlook the functioning of the National Authority.

Additional Information

• Chemical Weapons Convention Act:
• CWC aims to eliminate an entire category of weapons of mass destruction by prohibiting the development, production, acquisition, stockpiling, retention, transfer, or use of chemical weapons by States Parties.
• States Parties must take the steps necessary to enforce that prohibition within their jurisdiction.
• As a state party to the CWC India enacted Chemical Weapons Convention Act in 2000.
• In 2000, the Chemical Weapons Convention Act was passed by the Parliament which came into force in 2005.
• India is one of the four non-elected Members of the Executive Committee (consisting of 41 members from all over the world) of the OPCW.
• Chemical Weapons Convention (CWC) is also called as Convention on the Prohibition of the Development, Production, Stockpiling and Use of Chemical Weapons and on Their Destruction.

The correct answer is 1600.

Key Points

• In 1600, the East India Company acquired a charter from the ruler of England, Queen Elizabeth I, granting it the sole right to trade with the East, without competition from other British traders.
• But that royal charter could not stop other European powers such as the Portuguese, Dutch, and French.
• And all those European companies wanted to buy the same things from India - fine qualities of cloth and spices.
• As competition grew, profits fell, and the European trading companies started building forts and fighting each other.
• With more business came more conflicts with Indian rulers, and it became difficult for the European traders to keep their business separate from Indian politics.

Additional Information

• Portuguese (1498) were 1^st company that came to India with Vasco da Gama who had discovered the sea route to India via **Cape of Good Hope(**Africa).
• Dutch East India Company came in 1595.
• English East India Company came to India in 1600.
• Danish East India Company came to India in 1616.
• French East India Company was the last company came to India in 1664.

The correct answer is Rumana Ahmed.

Key Points

• The seventh Women's Asia Cup tournament was played in Malaysia.
• Bangladesh defeated India in a nail-biting final of Asia Cup T20 2018 and became the first side to beat India in an Asia Cup final.
• Chasing 113, Bangladesh won the match on the last ball when they needed nine runs in the final over, bowled by Indian Captain Harmanpreet Kaur.
• The Player of the Match/Final is Rumana Ahmed (BAN).
• The Player of the Tournament is Harmanpreet Kaur (IND)
• The first Women's Asia Cup was played in Sri Lanka in April 2004.

The correct answer is It was formed by an Act of Parliament.

Key Points

• Planning Commission was replaced by a new institution NITI AAYYOG on January 1, 2015, with emphasis on the ‘Bottom –Up’ approach to envisage the vision of Maximum Governance, Minimum Government, Sustainable development, echoing the spirit of cooperative federalism and Agricultural reforms.
• NITI stands for “National Institution for Transforming India”.
• NITI Aayog is the premier policy ‘Think Tank’ of the Government of India, providing both directional and policy inputs. ; NITI Aayog also provides relevant technical advice to the Centre and States.
• It is not a constitutional body because a constitutional body is one that derives its powers, functions, and organizational structure from the Constitution of India.
• It has been passed by a resolution of the cabinet also called executive resolution.
• Structure of NITI Aayog
• The   Prime minister of India will be a chairperson.
• The governing council comprises the Chief minister of all the state and the Lieutenant governor of all Union territory.
• The regional meeting will be convened by the Prime minister and comprises the Chief minister of all the state and Lieutenant governor of all Union territory in the region. These will be chaired by the chairperson of NITI Aayog or his nominee.
• Experts, specialists and practitioners with the relevant domain are special invitees nominated by the Prime minister.

Additional Information

• Composition of NITI Ayog-
• Chairperson - Narendra Modi
• CEO -  Parameswaran Iyer
• Vice-Chairman - Dr. Suman Bery

The correct answer is Systole.

Key Points

• The rhythmic cycle of the heart includes the contraction and relaxation of the heart muscles to produce the cardiac cycle.
• The serial wise changes that take place in the heart is called the cardiac cycle.
• The heartbeat begins from the time of embryonal development.
• Once the heartbeat starts continues throughout life.
• The mammalian heart has 4 chambers:

1. The left atrium
2. The left ventricle
3. The right atrium
4. The right ventricle.

• The phase of the cardiac cycle-
• The contraction of the atria is termed atrial-systole.
• The relaxation of the atria is termed atrial-diastole.
• The contraction of the ventricles is termed ventricular systole.
• The relaxation of the ventricles is termed ventricular diastole.

Explanation-

• The duration of the cardiac cycle is the reverse ratio of heartbeat per minute.
• If the heartbeat per minute is 72, then the time of the cardiac cycle is 60/72 = 0.8 seconds.
• In a single cardiac cycle of man, it is divided into two-phase- Systole and Diastole
• Atrial systole = 0.1 second
• Atrial diastole = 0.7 second
• Ventricular systole = 0.3 second
• Ventricular diastole = 0.5 second

Additional Information

• The cardiac output (CO) is the volume of blood pumped by the left ventricle in one minute.
• Cardiac output in a normal adult is about 5 litres/minute.
• During each cardiac cycle, two prominent sounds (Lubb and Dup) are produced.
• The ejection fraction (EF) is the volume of blood pumped divided by the total volume of blood in the left ventricle.

The correct answer is 1953.

Key Points

• Deoxyribonucleic Acid (DNA)  was first isolated, analysed and reorganised as a unique macro-molecule by Friedrich Miescher in 1869.
• In 1953 James Watson and Francis Crick, aided by the work of biophysicists Rosalind Franklin and Maurice Wilkins, determined that the structure of DNA is a double-helix polymer, the molecule containing human genes.
• The DNA double-helix bio-polymer of nucleic acid, held together by nucleotides which base pair together.
• The structure of the DNA model was first published in the journal Nature by James Watson and Francis Crick in 1953.
• DNA is called the blueprint of life because it contains the instructions needed for an organism to grow, develop, survive and reproduce.
• DNA does this by controlling protein synthesis.
• The information in DNA is stored as a code made up of four chemical bases: adenine) (A, guanine (G), cytosine (C), and thymine (T).
• Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people.

Additional Information

The correct answer is Narmada.

Key Points

• The Narmada river originates from the north-eastern part of the Satpura range.
• It is also called the "lifeline of Madhya Pradesh and Gujarat".
• The river flows between Vindhya and Satpura ranges.
• It forms the traditional boundary between North India and South India.
• Sardar sarovar dam is but across the Narmada river.
• It drains into the Arabian Sea through the Gulf of Khambhat.
• Major tributaries of the Narmada river are:
• Hiran river.
• Tendoni river.
• Kolar river.
• Hatni river.
• Orsang river.
• Tawa river.
• Barna river.
• Indira Sagar dam is constructed on the river Narmada.
• Kanha national park is situated on the banks of the Narmada river.

Additional Information

The correct answer is Union Finance Minister.

Key Points

• The Financial Stability and Development Council (FSDC) has been constituted vide GOI notification dated December 30, 2010.
• The Council is chaired by the Union Finance Minister and its members are:-
• Governor, Reserve Bank of India,
• Finance Secretary and/or Secretary, Department of Economic Affairs, Secretary, Department of Financial Services, Chief Economic Adviser, Ministry of Finance, Chairman, Securities and Exchange Board of India, Chairman, Insurance Regulatory and Development Authority and Chairman, Pension Fund Regulatory and Development Authority.
• The Council deals, inter-alia, with issues relating to financial stability, financial sector development, inter–regulatory coordination, financial literacy, financial inclusion, and macro-prudential supervision of the economy including the functioning of large financial conglomerates.
• No funds are separately allocated to the Council for undertaking its activities.
• The Council and its Sub-Committee (chaired by Governor, Reserve Bank of India) deliberate on agenda items proposed by any of the members of the Council which broadly include matters relating to financial stability, inter-regulatory coordination, and financial sector development.

The correct answer is 21.

Key Points

• The central government on 28^th August 2018 constituted a new 21-member advisory panel on science, technology and innovation under the chairmanship of Principal Scientific Advisor, K VijayRaghavan.
• The council advises the PM on science, technology, as well as innovation, but also coordinate the implementation of the PMs vision.
• PM-STIAC replaced the Scientific Advisory Committee (SAC) to PM and Cabinet.

• The Appointments Committee of the Cabinet approved the extension in the tenure of Professor K VijayRaghavan as the PSA (Principal Scientific Advisor) for a period of one year beyond April 2, 2021, i.e. up to April 2, 2022.
• The extension order was issued by the Department of Personnel and Training.
• The office of the Principal Scientific Adviser to the Government of India was established in November 1999 by the Cabinet Secretariat.
• The PSA's office aims to provide pragmatic and objective advice to the prime minister and cabinet on matters related to science, technology, and innovation with a focus on the application of science and technology in critical infrastructure, economic and social sectors in partnership with government departments, institutions, and industry.

The correct answer is Cow.

Key Points

• In the abacus of the Sarnath pillar, four animals are shown representing four directions:
• A galloping horse (west)- Represents the horse Kanthaka, which Buddha is said to have used for going away from princely life.
• A bull (east)- Depicts the zodiac sign of Taurus, the month in which Buddha was born.
• An elephant (south)- Depicts the dream of Queen Maya- a white elephant entering her womb.
• A lion (north)- shows the attainment of enlightenment.
• The animals seem to follow each other turning the wheel of existence till eternity.
• Characteristics of Ashokan pillars are
• Ashoka got the inspiration for such pillars from Persians and the Greeks.
• They were generally monolithic and were made up of sandstone.
• They were polished pillars like the Lion Capital of Ashoka from Sarnath.
• The similarity of architecture suggests that they were all sculpted by craftsmen from the same region.
• The pillars have four component parts in two pieces.
• The three sections of the capitals are made in a single piece, often of a different stone to that of the monolithic shaft to which they are attached by a large metal dowel

The correct answer is Railways.

Key Points

• The then Railways Minister Suresh Prabhakar Prabhu on 13 June 2017 launched Mission Retro-Fitment to enhance the passenger's experience by upgrading the existing fleet of coaches with better furnishing, aesthetics & amenities and better safety features to provide safe and comfortable travel.
• The cost of refurbishing one coach will be nearly Rs 30 lakh while that of retro-fitting will be Rs 28 lakh.
• This is one of the largest retro fitment projects in the world as Indian Railways will refurbish and retrofit 40000 coaches by 2022-23.

Additional Information

The correct answer is Sugar in water.

Key Points

• The physical properties help in separating the homogenous mixtures.

• Those mixtures in which the substances are completely mixed together and are indistinguishable from one another are called homogeneous mixtures.

• A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture.

• Many homogeneous mixtures are commonly referred to as solutions.

• Some of the examples of homogeneous mixtures (or solutions) are Sugar solution, Salt solution, Copper sulphate solution, Seawater, Alcohol and water mixture, Petrol and oil mixture, Soda water etc.

• Heterogeneous mixture:

• A heterogeneous mixture is a mixture with a non-uniform composition that contains components in different phases.

• The composition varies from one region to another with at least two phases that remain separate from each other, with clearly identifiable properties.

• Heterogeneous mixtures contain particles that retain their chemical properties when they are mixed and can be distinguished after they are mixed.

• The components of heterogeneous mixtures can be separated by the filtration of chemical procedures.

• The two types of heterogeneous mixtures are suspensions and colloids.

• Sugar and sand form a heterogeneous mixture. If you look closely, you can identify tiny sugar crystals and particles of sand.

• Ice cubes in cola form a heterogeneous mixture.

The correct answer is The British and the French.

Key Points

• Carnatic wars -
• The Carnatic wars were fought between the British and the French.
• Through the British and the French came to India for trading purposes, they were ultimately drawn into the politics of India.
• The Anglo-French rivalry in India reflected the traditional rivalry of England and France throughout their histories.
• The Carnatic wars decided once for all that the English were to overpower French ambition in India.

Important Points

• First Carnatic war -  
• It took place between 1740 to 1748.
• It was an extension of Anglo-French rivalry caused by the Austrian war of succession.
• It ended in 1748 when the Treaty of Aix-La Chapelle was signed bringing the Austrian war of succession to a conclusion.
• Second Carnatic war - 
• It took place between 1749 to 1754.
• The background for the Second Carnatic war was provided by local rivalry in India.
• The war ended with the Treaty of Pondicherry in 1754.
• Third Carnatic war -
• It took place between 1758 to 1763.
• The background for the Third Carnatic war was provided by the Seven Years War in Europe.
• Battle of Wandiwash, the decisive battle of the Third Carnatic war was won by the English.
• It made English the supreme European power in India.

The correct answer is Amit Panghal.

Key Points

• Amit Panghal was born on 16 October 1995 in Mayna village of Rohtak district, Haryana.
• Amit Panghal was inspired by his brother Ajay, who is a former amateur boxer.
• Panghal won the gold medal in his debut appearance at the National Boxing Championships in 2017. and also he claimed a bronze in Asian Championships in 2017.
• He won a silver in the 2018 Commonwealth Games.
• the International Olympic Committee (IOC) released its Boxing Task Force (BTF) rankings on 26 June 2021. Which declared Amit Panghal as number 1 in its ranking, and he is the only Indian Olympic-bound boxer to be ranked number 1.

Additional Information

The correct answer is Bronze.

Key Points

• The Indus Valley Civilization was a cultural and political entity which flourished in the northern region of the Indian subcontinent between c. 7000 - c. 600 BCE.
• The art of bronze-casting was practised on a wide scale by the Harappans.
• Their bronze statues were made using the ‘lost wax' technique-
• The wax figures were first covered with a coating of clay and allowed to dry.
• Then the wax was heated and the molten wax was drained out through a tiny hole made in the clay cover.
• The hollow mould thus created was filled with molten metal which took the original shape of the object.
• Once the metal cooled, the clay cover was completely removed.
• The Bronze figures of humans, as well as animals, are found in this civilization.
• The best example of the human figure is the statue of a girl popularly titled ‘Dancing Girl’.
• The copper dog and bird of Lothal and the bronze figure of a bull from Kalibangan are popular animal figures.
• Bronze casting was popular at all the major centres of the Indus Valley Civilisation.
• The late Harappan and Chalcolithic sites like Daimabad in Maharashtra show prime examples of metal-cast sculptures

The correct answer is General.

Key Points

• About Chief of the Army Staff:
• Field Marshal rank was the highest rank in the army which has been abolished by the present army.
• The Chief of Army Staff is a Four-Star Rank head of the Indian Army.
• At present, It is the highest rank of commander of the Indian Army.
• The rank of the Chief of the Army Staff in India is General.
• The Chief of the Army Staff(COAS) is a Military adviser to the Ministry of Defence and the Government of India.
• The Post of Commander-in-Chief of the Indian Army was established in 1748 to designate the Commander of all the Armed forces of East India Company(Later free Independent India).
• The Appointments of the Chief of Army Staff are made by the Appointments Committee of the Cabinet (ACC). The COAS is appointed for three years(3) in the office or at the age of 62, whichever is earlier.
• General Manoj Pande is the Indian Army General serving as the 29^th and the current Chief of the Army Staff.

Important Points

• ADMIRAL OF THE FLEET - Also known as Fleet Admiral, Admiral of the Fleet is an honorary five star rank of the highest order in the navy. In many nations, the rank is reserved for wartime or ceremonial appointments. No officer of the Indian Navy has yet been conferred this rank.
• ADMIRAL - Also known as the Chief of the Naval Staff, It is the commander and highest-ranking officer in the Indian Navy. It is a four-star rank. Admiral R. Hari Kumar is the current Chief of the Naval Staff.
• Marshal of the Air Force is the highest rank in the Air force.
• Arjan Singh has received the rank of the Marshal of the Indian Air Force and is the only living Indian military officer with a 5-star rank.
• The highest rank attainable in the Indian Army is Field Marshal.
• Ranked as a Five Star General Officer, a Field Marshal is ranked above a General.
• The Field Marshal rank has been awarded to Kodandera Madappa Cariappa and Sam Manekshaw till date
• A Field Marshal's insignia comprises the national emblem over a crossed baton and saber in a wreath of lotus flowers.

The correct answer is f - k, d - p, a - t, m - q.

Key Points

The correct answer is Family Floater.

Key Points

• Family Floater cover: 
• It is the type of health insurance in which the whole family is covered under the single plan.
• Any family member covered under the policy can claim in case of hospitalization and surgical expenses.
• The policy has one single sum insured, which can be utilized by any/all insured persons in any proportion or amount subject to maximum of overall limit of the policy sum insured.

Additional Information

• Health insurance is the insurance in which the policyholder is covered for medical and surgical expenses during the tenure of the policy. It can be further classified as : 
• Comprehensive health insurance cover: It is the complete package of the health cover that includes almost all the healthcare facility and healthcare needs and ensures complete peace of mind, regardless of the situation of life.
• Individual Health Insurance Cover: Individual Health Insurance Cover is a type of health insurance that covers the health expenses of an insured individual. These policies pay for the surgical and hospitalization expenses of an insured individual till the cover limit is reached.
• Group Health Cover: Group Health Insurance cover is bought by an employer for his employees. The premium in group insurance is lower than an individual health insurance policy.
• Group health plans are usually standardized in nature and offer the same benefits to all employees.
• Critical Illness Health Cover: Critical Illness Policy covers the expenses involved in treating life-threatening diseases like a tumor, permanent paralysis, etc.
• These policies usually pay a lump sum amount to the insured persons on the diagnosis of serious diseases covered in the policy.
• Unlike other policies, Individual Health Insurance and Family Floater Policy, hospitalization is not required, only the diagnosis of the disease is enough to claim the benefits.

The correct answer is Pradhan Mantri Bhartiya Janaushadhi Pariyojana.

Key Points

• Pradhan Mantri Bhartiya Janaushadhi Pariyojana : 

• Pradhan Mantri Bhartiya Janaushadhi Pariyojana (PMBJP) was launched by the Department of Pharmaceuticals in 2008 under the name Janaushadi Campaign which further revamped as PMBJP in 2015-16.

• The aim of this scheme is to-

• Extend the coverage of quality generic medicines.

• Decrease the out of pocket expenditure on medicines and thereby redefine the unit cost of treatment per person.

• Create awareness about generic medicines through education and publicity so that quality is not synonymous with only a high price.

• Janaushadhi Kendras were set up across the country under PMBJP to provide generic drugs.

• Janaushadhi Week was celebrated across the country from 1^st to 7^th March 2020.

• Janaushadhi Sugam Application was launched in August 2019.

The correct answer is ​Ms. Rekha Sharma.

Key Points

• NCW member Rekha Sharma has been appointed as the chairperson of the National Commission for Women.
• Rekha Sharma was earlier a member of the Commission and was holding the additional charge of the chairperson.
• The National Commission for Women is the apex national level organisation of India with the mandate of protecting and promoting the interests of women.
• The National Commission for Women (NCW) is a legislative body of the Indian government tasked with providing advice to the government on all policy issues concerning women.
• It was created on January 31, 1992, under the Indian Constitution, as specified by the National Commission for Women Act of 1990.
• Jayanti Patnaik was the commission's first chairperson.
• The NCW's mission is to advocate for women's rights in India and to give a voice to their issues and concerns.

Additional Information

• Mamta Sharma was the former chairperson of the National Commission for Women of India in India.
• Girija Vyas is a politician, poet, and author from India. She was a former president of the National Commission for Women of India and a member of the 15^th Lok Sabha, India's lower house of Parliament, from the Chittorgarh constituency.

$\dfrac{(5^4)^{6.25}\times(5^2)^{2.6}}{(5^4)^{6.75}\times(5^{1/2})^{2.4}}\times\dfrac{(0.7^2)^4\times(0.7^3)^4}{(0.7^4)^5}$

$\dfrac{(5^{25})\times(5^{5.2})}{(5^{27})\times(5^{1.2})}\times\dfrac{(0.7^8)\times(0.7^{12})}{(0.7^{20})}$

${(5^{25 +5.2-27-1.2})}\times{(0.7^{8+12-20})}$

${(5^2)}\times{(0.7^0)}$

= 25

Concept used:

Follow the BODMAS rule according to the table given below:

Calculation:

$\frac{7}{5-\frac{8}{2}} \times \frac{4 - \frac{3}{2}}{3- \frac{2}{3- \frac{3}{2}}}- \frac{5}{14} \ \rm of \left[ \frac{3 \frac{1}{3} - 2 \frac{1}{2}}{2 \frac{5}{21} - 2} \ of \ 1 \frac{1}{5} + \frac{7}{10} \right]$

⇒ $\frac{7}{\frac{10 -8}{2}} \times \frac{ \frac{8-3}{2}}{3- \frac{2}{\frac{6-3}{2}}}- \frac{5}{14} \ \rm of \left[ \frac{ \frac{10}{3} - \frac{5}{2}}{\frac{47}{21} - 2} \ of \ \frac{6}{5} + \frac{7}{10} \right]$

⇒ ${7}{} \times \frac{ \frac{5}{2}}{3- \frac{2 \times 2}{{}{2}}}- \frac{5}{14} \ \rm of \left[ \frac{ \frac{20 -15}{6} }{\frac{47- 42}{21} } \ of \ \frac{6}{5} + \frac{7}{10} \right]$

⇒ ${7}{} \times{ \frac{5}{2}}\times\frac{3} {5}- \frac{5}{14} \ \rm of \left[ \frac{ {5} } 6\ \times \frac{21}{5}of \ \frac{6}{5} + \frac{7}{10} \right]$

⇒ ${ \frac{21}{2}}- \frac{5}{14} \ \rm of \left[ \frac{21}{5} + \frac{7}{10} \right]$

⇒ ${ \frac{21}{2}}- \frac{5}{14} \ \rm of \frac{(42 + 7)}{10}$

⇒ ${ \frac{21}{2}}- \frac{5}{14} \ \rm of \frac{49}{10}$

⇒ ${ \frac{21}{2}}- \frac{7}{4}$

⇒ ${ \frac{42-7}{4}}$ = 35/4 = 8.75

∴ The value of $\frac{7}{5-\frac{8}{2}} \times \frac{4 - \frac{3}{2}}{3- \frac{2}{3- \frac{3}{2}}}- \frac{5}{14} \ \rm of \left[ \frac{3 \frac{1}{3} - 2 \frac{1}{2}}{2 \frac{5}{21} - 2} \ of \ 1 \frac{1}{5} + \frac{7}{10} \right]$ lies between 8.25 to 9.25.

Given: 

Marks up % = 40%, more than Cost Price 

discount = 12.% and Rs. 39 is given to customer

profit = 18%

Concept: 

S.P = M.P - Discount

Profit = S.P - C.P

Calculation: 

Let cost price of an article is 100 units.

According to the question

The marked price is 

⇒ x + (x × 40%)

⇒ x + 0.4x 

⇒ 1.4x units

Now, 

Discount on the article is 

⇒ 1.4x - (1.4x × 12%)

⇒ 1.232x

Again, Discount is 

⇒ 1.232x - 39

Selling price = 1.232x - 39      ----(1)

Then, The profit on the article is 

⇒ x + (x × 18%)

⇒ 1.18x      ----(2)

Equating  (1) and (2)

⇒  1.232x - 39  = 1.18x 

⇒ 1.232x - 1.18x = 39

The cost price of the article is = Rs. (39/0.052) = Rs. 750

∴ Cost price of the article is Rs. 750

Alternate Method Let the number of students initially be n.

The total weight = 24n

The total weight in the first condition = 24n + 18 × 5 = 24n + 90

The total weight in the second condition = 24n - 24.5 × 10 = 24n - 245

The average is the same.

⇒ (24n + 90) /(n + 5)= (24n - 245)/(n - 10)

⇒ 24n² - 150n - 900 = 24n² - 125n - 1225

⇒ 25n = 325

⇒ n = 13

∴ The number of children in starting is 15.

Traditional method:

Given:

The average weight of some children in a camp was 24 kg.

10 children having average weight 98/4 kg left the camp.

5 children having average weight 18 kg joined the camp. 

Formula used:

Average weight = Total weight/Number of people

Calculation:

Let total number of children in the camp be x

Average weight of x children = 24

Sum of weight of x children = 24x

Average weight of 10 children = 98/4

Sum of weight of 10 children = 98/4 × 10 = 245

Average weight of 5 children = 18

Sum of weight of 5 children = 18 × 5 = 90

According to the question,

24(x + 5 - 10) = 24x – 245 + 90

24(x - 5) – 155 = 24x

⇒ x = 13

∴ initially 13 children were in the camp.

16 L of a solution containing 15% acid,

Acid = 15% of 16 = 2.4 L

 20 L of another solution containing 16% acid

Acid = 16% of 20 =  3.2 L

Total Mixture = 16 + 20 + 4 = 40 L

Percentage of water in 16 L solution = 16 - 2.4 = 13.6

Percentage of water in 20 L solution = 20 - 3.2 = 16.8

Percentage of water in 4 L solution = 4 - 0 = 4

percentage of water = (13.6 + 16.8 + 4) × 100/40

percentage of water = 86%

$\left(\sqrt{1+\frac{\sqrt{3}}{2}}+\sqrt{1-\frac{\sqrt{3}}{2}}\right)\div\frac{1+\sqrt{1-\frac{2}{4}}}{\frac{\sqrt{3}}{2}}$

Let A = $\left(\sqrt{1+\frac{\sqrt{3}}{2}}+\sqrt{1-\frac{\sqrt{3}}{2}}\right)$ and B = $\frac{1+\sqrt{1-\frac{3}{4}}}{\frac{\sqrt{3}}{2}}$

We know A/B = A²/B²

A² = $1 + \frac{\sqrt{3}}{2} + 1 - \frac{\sqrt{3}}{2} +2\sqrt{1-\frac{3}{4}}$ = 2 + 2√1/4 = 2 + 1 = 3

B² = [1 + (1 - 3/4) + 2√1/4] / [3/4] = 9/4 × 4/3 = 3

∴ A²/B² = A/B= 3/3 = 1

Given:

A can do a piece of work in 10 days

B can do it in 15 days

C can do it in 20 days

Calculation:

A can complete the work in = 10 days

A’s 1 day’s work = 1/10

B can complete the work in = 15 days

B’s 1 day’s work = 1/15

C can complete the work in = 20 days

C’s 1 day’s work = 1/20

(A + B + C)  work for 2 days = 13/30 work done

According to problem,

⇒(2/10) + (6/15) + (x + 8/x) = 1

⇒ (1/x) = (5 - 2- 1)/30

⇒ 1/x = 3/20

⇒ x = 20/3

∴ C alone can complete the work in 20/3 days.

Alternate Method We will find the combined work done by A, B, and C together.

To find this we will find LCM of 10, 15, and 20.

LCM of 10, 15, and 20 is 60. 

Let us assume The combined work done by A, B, and C is 60 units.

Work done by A in 1 day is 60/10 = 6 units

Work done by B in 1 day is 60/15 = 4 units

Work done by C in 1 day is 60/20 = 3 units

 According to Question:

Work done by A in 2 days = 6× 2 = 12 units (A leaves off after 2 days)

Work done by B in 4 days = 4 × 4 = 16 units (B leaves after 4 days from the beginning)

Work done by C in 4 days = 3 × 4 = 12 units 

Total work done by A, B, and C is 40 units. The remaining 20 units will be done by C.

20 units of work will be done in 20/3 days ($6\dfrac{2}{3}$ days).

Given:

Ratio of the speeds of the two cars = 5 ∶ 11

Formula Used:

Speed = Distance/Time

Calculation:

Speed of B = 450/6 = 75 km/hr

According to Question

speed of A = 2/3 × 75 = 50 

By the given ratio, 

5x = 50

x =10

Speed of C = 11 × 10 = 110 km/hr

The distance (in km) covered by C = 110 × 3.6

The distance (in km) covered by C =  396 km

Given,

Mean proportional between 0.8 and 9.8 = x

 third proportional to 0.7 and 2.8 = y

Formula:

If the mean proportion between a and b be x, then x = √ab

Third proportional to x, y = y2/x

Calculation:

⇒ Mean proportional of 0.8 and 9.8 = √(0.8 × 9.8) = 2.8

We know that,

⇒ Third proportional to 0.7 and 2.8 = (2.8)2/0.7 = 11.2

Required ratio = 2.8 ∶ 11.2

Required ratio = 1 ∶ 4

∴ Required ratio = 1 ∶ 4

(A + B) can complete the work in 20 days.             

⇒ (A + B)’s 1 day’s work = 1/20

⇒ (A + B)’s 5 day’s work = 5/20 = 1/4

⇒ Remaining work = 1 - 1/4 = 3/4

According to the question, after 5 days C assisted A and B and the work completed 5 days before.

⇒ The work is completed in = (20 - 5) = 15 days

⇒ (A + B + C) worked together for = 15 - 5 = 10 days         

⇒ (A + B + C)’s 10 day’s work = 3/4

⇒ (A + B + C)’s 1 day’s work = 3/40

⇒ C’s 1 day’s work = (3/40) - (1/20) = 1/40

⇒ C can complete the work in = 40 days

According to the question,

3 day’s work of B = 4 day’s work of C

⇒ 3 day’s work of B = 4/40 = 1/10

⇒ 1 day’s work of B = 1/30

⇒ B can complete the work in = 30 days

⇒ B + C will complete the work in = 1/30 + 1/40 = 7/120 = 120/7 days

Given:

Compound interest = Rs. 6,300

Rate = 10%

Time = 2 years

Formula:

Let P = Principal, R = rate of interest and N = time period

Compound interest = P(1 + R/100)N - P

Calculation:

6300 = P{(1 + 10/100)2 - 1}

P = 6300/0.21

P = Rs. 30,000

Now, according to Question,

Compound interest = P{(1 + R/100)N - 1}

Compound interest = 30000(1 + 10/100)3$\frac{1}{4}$ - 30000

Compound interest = 30000{(11/10)3 × (41/40)} - 30000

Compound interest = 30000{(1331/1000) × (41/40)} - 30000  

Compound interest = 30000{54571/40000} - 30000  

Compound interest = Rs. 10,928

First we find the difference between the numbers 1288, 8139, 17200.

The required numbers are  

8139 - 1288 = 6851

17200 - 1288 = 15912

17200 - 8139 = 9061

Now, We find the HCF of 9061, 15912 and 6851

The factors of 6851 = 1, 13, 17, 31, 221, 403, 527, 6851

The factors of 9061 = 1, 13, 17, 41, 221, 533, 697, 9061

The factors of 15912 = 1, 2, 3, 4, 6, 8, 9, 12, 13, 17, 18, 24, 26, 34, 36, 39, 51, 52, 68, 72, 78, 102, 104, 117, 136, 153, 156, 204, 221, 234, 306, 312, 408, 442, 468, 612, 663, 884, 936, 1224, 1326, 1768, 1989, 2652, 3978, 5304, 7956, 15912

The sum of digits is 221 = 2 + 2 + 1 = 5

Therefore, the sum of digits is 5.

Given:

radius = height

Concept:

Using the volume formula, calculate the ratio

Formula used:

Lateral surface area of hemisphere = 2πr2

Lateral surface area of cone = πrl

Lateral height (l) = √(r2 + h2)

Calculation:

Lateral height (l) = √(r2 + h2) = r√2

Lateral surface area of cone : Lateral surface area of hemisphere =  πr(r√2) : 2πr2

Lateral surface area of cone : Lateral surface area of hemisphere = 1 : √2

monthly incomes of A and B = 6 ∶ 5 

Monthly expenses of A and B = 9 ∶ 8

According to Question

5x = 9y

y = 5x/9

Savings of A = 6x - 5x = x

Savings of B = 5x - 8y = 5x - 8(5x/9)

Savings of B = 5x/9

Ratio of savings of A and B = x : 5x/9

Ratio of savings of A and B = 9 : 5

Given:

The cost price of the articles = Rs. 480

To get an overall 20% gain

Formulae used:

Profit% = (SP - CP)/CP × 100

Loss% = (CP - SP)/CP × 100

where CP → Cost Price, SP → Selling Price

Calculations:

Total Selling Price = (120/100) x 480 = 576

One third of the CP = 1/3 x 480 = Rs. 160

But given 1/3 of articles are sold at 10% loss

S.P of 1/3 of articles = 90% of 160

= 90 x 160/100 = 144

Then, S.P on remaining 2/3 goods must be

= 576 - 144 = 432 ...........(1)

CP on remaining goods

= 2/3 x 480 = 320 ............(2)

Profit = SP - CP = 432 - 320 = 112

Profit %  = (112/320) x 100

Profit % = 35%.

Alternate MethodLet the profit% on the remaining part be x% 

Now according to the question,

⇒ (1/3) × (-10) + (2/3) × (x) = 20

⇒ -10 + 2x = 60 

⇒ 2x = 70

⇒ x = 35% 

∴ The required profit% is 35%.

Given:

One parallel side of trapezium (a) = 70 m

Second parallel side of trapezium (b) = 170 m

non-parallel sides = 130 m

Formula used:

Pythagoras theorem: 

Hypotenuse² = Base² + Perpendicular²

Area of trapezium = 1/2 × (a + b) × h

Area of an equilateral triangle = (√3/4) × (side)2

Calculations:

In a  Δ ADE, using Pythagoras theorem, 

AD² = AE² + DE²

⇒ AE = √(AD² - DE²) 

Height of trapezium (h) = √(130² - 50²) = 120 m

Area of trapezium = 1/2 × (70 + 170) × 120

Area of trapezium = 1/2 × (240) × 120 = 14400 m²

According to Question

Area of trapezium = Area of an equilateral triangle

14400 =  (√3/4) × (side)2

(side)2 = 14400/(√3/4) 

side = ​80(27)^1/4​

Given: 

Ratio of speed of boat in still water and speed of stream = 3 : 1

Formula used:

Speed = Distance ÷ Time

Downstream speed = (speed of boat in still water + speed of stream)

Upstream speed = (speed of boat in still water –  speed of stream)

Calculation:

upstream speed of boat = 3x - x = 2x

downstream speed of boat = 3x + x = 4x

⇒ 4x × 3.5 - 2x × 3 = 33.6

⇒ 8x = 33.6

⇒ x = 4.2

∴ Required speed of the boat in still water = 4.2 × 3 = 12.6 km

Let the number of students in the class be x

Number of Boys in class = 0.6x

Number of Boys that get scholarship = 0.35 × 0.6x = 0.21x

Number of Girls in class = 0.4x

Number of Girls that get scholarship = 0.4x × 0.6 = 0.24x

According to Question

0.4x = 0.24x + 32

0.16x = 32

x = 200

Number of Boys that did not get scholarship = 0.6x - 0.21x = 0.39x

Number of Boys that did not get scholarship = 78

Calculation:

number of male employees in departments B = 6300 × 21/100 × 10/21 = 630

number of male employees in departments D = 6300 × 27/100 × 13/27 = 819

number of male employees in departments E = 6300 × 15/100 × 7/15 = 441

number of male employees in departments B, D and E together = (630 + 819 + 441) = 1890

number of female employees in A = 6300 × 17/100 × 6/17 = 378

number of female employees in E = 6300 × 15/100 × 8/15 = 504

number of female employees in F = 6300 × 11/100 × 6/11 = 378

number of female employees in departments B, D and E together = (378 + 504 + 378) = 1260

∴ Required ratio = 1890: 1260 = 3 : 2

Given:

Total number of employees = 6300

Ratio of Males and Female employees in depatment C = 4 : 3

Ratio of Males and Female employees in depatment D = 13 : 14

Calculation:

Total number of employees in department E: 15% of Total number of employees.

$15 \over 100$(\times 6300 \)( = 945\)

Total Number of Employees in department C: $9 \over 100$ $\times 6300 = 567$

Females in department C: $567 \over 7$ $\times 3 = 243$

Total Number of Employees in department D: $27 \over 100$ $\times 6300 = 1701$

Females in department D: $1701 \over 27$ $\times 14 = 882$

Total Number of Females in department C and D: 243 + 882 = 1125

Required percentage: $1125 - 945 \over 1125$ $\times 100 = 16\%$

Hence, 16 will be the correct answer.

The correct answer is 'Resistant'.

Key Points

• Let's explore the given option and the marked option.
• Immune:  not affected by something that happens or is done.
• Example: The Labour Party is not immune to new ideas.
• Resistant:  opposed to something and wanting to prevent it from happening.
• Example: Many managers are resistant to change.
• Thus, from the above-given option, we can say that both 'Immune' and 'Resistant' are synonyms to each other.
• Therefore, the correct answer is option 2.

Additional Information

• Let's explore the other options:

The correct answer is 'to;in;in'.

Key Points

• Preposition: Preposition is a word that shows the relationship between a noun or pronoun and some other word or element in the rest of the sentence. Some common prepositions are 'of', 'on', 'in', 'with', 'for', 'at', etc.
• In: As a preposition, it is used to express the situation of something that is or appears to be enclosed or surrounded by something else or experiencing a situation or condition, or feeling an emotion**.**
• Example: Her parents live in New Zealand now.
• To: As a preposition, it is used to say what or who an action, attitude, situation etc affects or is related to.
• Example: The factory clearly represents a danger to health.

Therefore, the correct sentence is: 'The communists lost to the conservatives in the first free elections in Croatia.' 

Additional Information

• Let's explore the meaning of the other options:
• Of: 'Of' as a preposition is used to show who something or someone belongs to or has a connection with.
• Example: Avocado salad is a favourite of mine.
• On: As a preposition, it is used to express something is touching a surface or being supported by a surface.
• Example: People were sunbathing on the grass.

For: As a preposition, it is used to say what the purpose of an object, action etc is.

• Example:  I’ve bought him a watch for his birthday.
• At: As a preposition, it is used to say exactly where something or someone is, or where something happens
• Example: I was waiting at the bus stop.​
• With: As a preposition, it is used to say what covers or fills something.
• Example: Her boots were covered with mud.

The correct answer is 'meanwhile'.

Key Points

• Let's explore the options:

• Thus, from the above-given explanation, it is clear that 'meanwhile' will be used in the blanks as two actions are taking place simultaneously.

Therefore, the correct answer is: I was working on my Mathematics meanwhile Taru and Kavya were playing chess.

The correct answer is 'Distinguished'.

Key Points

• Let's explore the meaning of the options:

• Thus, from the above-given explanation, we can say that 'Distinguished' is the correct answer.

The correct answer is 'didn't get'.

Key Points

• The given sentence is an example of parallelism.
• The rule of parallelism: It states that if there is one subject and multiple verbs in the sentence then each and every verb will follow the subject and the time and tense of the verb will be the same.
• Example: When the woman went to the game, her dog felt lonely, so the people played with him.
• Since the first verb i.e. 'were wearing' is in the simple past tense, then simple past tense will be used in the blank as well.
• Thus, 'didn't get' will be used in the sentence.

Therefore, the correct sentence is: 'Jayati and Madhav were wearing their raincoats. Therefore, when the rain came, they didn't get wet.' 

Additional Information

• Simple past tense: It is used to express an action that started in past, finished in past, and has no relation with the present.
• Structure:  Subject+ the second form of verb.
• Example: He went to the market.

The correct answer is 'Moxi take on non-patient-facing logistical tasks and reduce trips by nurses to supply rooms.', i.e. it is an incorrect statement.

Key Points

• The error lies in the usage of the verb 'take'.
• The subject of the sentence i.e. 'Moxi' is singular and will take singular verb according to the subject-verb agreement.
• Thus, the usage of the verb 'take' needs to be replaced with 'takes'.
• Therefore, the correct answer is option 4.

Additional Information 

• Subject-verb agreement: It states that if the subject is singular then verb will be singular and if the subject is plural then the verb will be plural.
• Example:
• He is planning a trip to Sikkim.
• They are planning a trip to Sikkim.

The correct answer is 'were not listening'.

Key Points

• Let's take a look at the keyword 'yesterday', it denotes that the sentence is in the simple past tense.
• When 'past time' such as 'yesterday', 'two days ago', etc are mentioned in the sentence then only the simple past tense will be used in the sentence.
• Simple past tense: It is used to express the action, that started in past, finished in past, and has no relation with the present.
• Structure: Subject+ the second form of verb.
• Example: He went to Delhi two days ago.
• Thus, 'were not listening' will be used in the blank.

Therefore, the correct sentence is: 'Yesterday, I noticed that when the teacher was teaching. you were not listening to her.'

The correct answer is 'anticipated'.

Key Points

• Let's explore the meaning of the options:

• Thus, from the above-given explanation, 'anticipated' will be used in the blank as the sentence is explaining that no one was expected the intensity of flood in Kerala.

Therefore, the correct sentence is: 'No one anticipated that the intensity of the floods in Kerala would be so great that it would demolish village after village.'

The correct answer is 'Stand'.

Key Points

• Let's explore the given option and the marked option.
• Subside: gradually sinks to a lower level.
• Example: After the heavy rains, part of the road subsided.
• Stand:  have or maintain an upright position, supported by one's feet.
• Example: Friendship cannot stand always on one side.
• Thus, from the above-given option, we can say that both 'Subside' and 'Stand' are antonyms to each other.
• Therefore, the correct answer is option 2.

Additional Information

• Let's explore the other options:

The correct answer is 'of;with'.

Key Points

• Preposition: Preposition is a word that shows the relationship between a noun or pronoun and some other word or element in the rest of the sentence. Some common prepositions are 'of', 'on', 'in', 'with', 'for', 'at', etc.
• Of: 'Of' as a preposition is used to show who something or someone belongs to or has a connection with.
• Example: Product inspection is the responsibility of the employees themselves.
• With: As a preposition, it means 'including'.
• Example: Two nights’ accommodation with breakfast and evening meal cost us just over £250.

Therefore, the correct sentence is: 'A country of striking natural beauty with a stunning Adriatic coastline, Croatia is very popular as a tourist destination.' 

Additional Information

• Let's explore the meaning of the other options:
• On: As a preposition, it is used to express something is touching a surface or being supported by a surface.
• Example: Leave your things on the table over there.
• For: As a preposition, it is used to say what the purpose of an object, action etc is.
• Example: What did you do that for?
• At: As a preposition, it is used to say exactly where something or someone is, or where something happens
• Example: Does this train stop at Preston?
• In: As a preposition, it is used to say where someone or something is.
• Example: My mother was in the kitchen.

The correct answer is 'so'.

Key Points

• 'I....traffic' and 'I...auto' are two clauses of the sentences, conjunction is required to join these two clauses.
• Let's explore the options:

• Thus, from the above-given explanation, we can say that 'so' will be used in the blank.

Therefore, the correct sentence is: I don’t like to drive in the Delhi traffic so I use Metro and auto.

The correct sequence for the given sentences is 'CADBE'.

Key Points

• Sentence C comes first as it introduces the subject i.e. Researchers.
• Sentence A follows C as it mentions the recommendation of the researchers.
• Sentence D follows A as it mentions what are these recommendations.
• Sentence B follows D as it states the suggestion of introducing the recommendation.
• Statement E will be the last part.
• Thus, the sequence becomes:
• C. Researchers at the US National Library of Medicine​
• A. recommend that
• D. 'no selfie zones'
• B. should be introduced
• E. at dangerous spots to reduce deaths

Correct Sequence: CADBE

The correct answer is 'Imagine'.

Key Points

• Let's explore the meaning of the given word and the marked word.
• Reckon: to think or suppose something.
• Example: The police reckon that whoever killed Dad was with him earlier that day.
• Imagine: suppose or assume.
• Example: After Ned died, everyone imagined that Mabel would move away.
• Thus, from the above-given explanation, we can say that 'Reckon' and 'Imagine' are synonyms to each other.
• Therefore, the correct answer is option 1.

Additional Information 

• Let's explore the meaning of the other options:

The correct answer is 'who once marked', i.e. the error lies in this part of the sentence.

Key Points

• The error lies in the incorrect usage of the pronoun 'who'.
• 'Who' is needs to be replaced with 'which'.
• Pronouns are used in a sentence to replace a noun i.e. they point to a noun that is already mentioned in the sentence.
• Here, in the above sentence 'who' is pointing towards 'the remains of a roman village' which is incorrect as 'who' is used to refer to people or human beings, whereas 'which' is used to refer to things or objects in general.

Therefore, the correct sentence is: Archaeologists in the Netherlands have discovered a 2,000-year-old stretch of Roman road and the remains of a Roman village at the town of Katwijk, which once marked the northern boundary of the Roman Empire.

The correct answer is 'access'.

Key Points

• Let's explore the meaning of the options:

• Thus, from the above-given explanation, it is clear that 'access' will be used in the sentence as the sentence is explaining to someone that they can see the video on YouTube.

Therefore, the correct sentence is:  You can still access the video that she has uploaded on the YouTube.