English Comprehension PYQs

The correct answer is 'twist in the wind'.

 

Key Points

• The idiom 'twist in the wind' means to be left in a state of suspense or to be left to suffer or face a difficult situation without assistance or support.
• In the context of the sentence, it implies that Sohan abandoned his friend when the situation became too difficult to handle, leaving the friend to face the consequences alone.
• The other phrases like 'twist in the machine', 'twist in the grate', and 'twist in the vice' are not recognized idioms in the English language.

Therefore, the correct answer is 'Option 1'.

Complete Sentence: When Sohan noticed that he could not handle the situation, he decided to leave his friend to twist in the wind.

Additional Information

• The origin of the phrase 'twist in the wind' is often attributed to the image of a body left hanging after an execution, but in modern usage, it is strictly a metaphor for being ignored or abandoned by those who could help.
• Synonyms for this idiom include left in the lurch or left high and dry.

Question 1. Which among the following alternatives is an idiom that means 'to start to rain heavily' ?

The correct answer is: The heavens open.

Key Points

• The phrase 'to start to rain heavily' refers to the commencement of rain with great intensity and volume. (मूसलाधार बारिश शुरू होना)
• Example: We had to cancel our football match because it started to rain heavily.
• 'The heavens open' is an English idiom used to describe a situation where it suddenly begins to rain very hard. (अचानक बहुत तेज़ बारिश शुरू होना)
• Example: No sooner had we stepped out of the house than the heavens opened, and we were drenched.
• Hence, we can infer that the idiom that means 'to start to rain heavily' is 'the heavens open'.

Therefore, the correct answer is- The heavens open.

Additional Information

Here are the other options explained along with their Hindi meanings and example sentences:

• The stars open (सितारों का खुलना): This is not a standard English idiom and does not have a specific metaphorical meaning related to weather.
• Example: The phrase 'the stars open' is not used in common English parlance to describe rain.
• The lightening open (बिजली का खुलना): This is an incorrect phrase; the standard term is 'lightning strikes' or 'flashes', but 'open' is not used idiomatically here.
• Example: While there was a lot of thunder, the lightening open is not a recognized expression.
• Zeus' pitcher open (ज़्यूस के घड़े का खुलना): While Zeus is the Greek god of sky and rain, this specific combination of words is not an established English idiom.
• Example: Authors might use 'Zeus' pitcher' as a poetic reference, but it is not a common idiom for heavy rain.

The correct answer is: Fragrance.

Key Points

• The word 'aroma' refers to a distinctive, typically pleasant smell, often associated with food, spices, or flowers. (सुगंध)
• Example: The wonderful aroma of freshly baked cookies filled the entire house.
• 'Fragrance' refers to a pleasant, sweet smell, especially one that is produced by flowers, perfumes, or plants. (खुशबू)
• Example: The fragrance of jasmine in the garden is particularly strong at night.
• Hence, we can infer that the closest synonym to the word 'aroma' is 'fragrance'.

Therefore, the correct answer is- Fragrance.

Additional Information

Here are the other options explained along with their Hindi meanings and example sentences:

• Noise (शोर): A sound, especially one that is loud, unpleasant, or causes a disturbance.
• Example: The constant noise from the heavy traffic made it difficult to concentrate on my work.
• Delight (आनंद): A feeling of great pleasure, satisfaction, or happiness.
• Example: The little girl danced with delight when she received her birthday presents.
• Insight (अंतर्दृष्टि): The capacity to gain an accurate and deep intuitive understanding of a person or thing.
• Example: The documentary provides a fascinating insight into the hidden lives of deep-sea creatures.

The correct answer is: Applaud.

Key Points

• The word 'praise' means to express warm approval or admiration of someone or something, often for their achievements or qualities. (प्रशंसा करना)
• Example: The principal gave her high praise for winning the national debate competition.
• 'Applaud' refers to showing strong approval or praise for someone, typically by clapping hands or expressing verbal admiration. (सराहना करना/तालियाँ बजाना)
• Example: The audience began to applaud enthusiastically as the play came to an end.
• Hence, we can infer that the most appropriate synonym of 'praise' is 'applaud'.

Therefore, the correct answer is: Applaud.

Additional Information

Here are the other options explained along with their Hindi meanings and example sentences:

• Criticize (आलोचना करना): To indicate the faults or shortcomings of someone or something in a disapproving way.
• Example: It is easier to criticize someone else's work than to do it yourself.
• Blame (दोष देना): To assign responsibility for a fault, mistake, or wrong action.
• Example: You cannot blame the weather for your lack of preparation.
• Complain (शिकायत करना): To express dissatisfaction, pain, or annoyance about a state of affairs or an event.
• Example: She went to the manager to complain about the rude behavior of the staff.

The correct answer is: None of the options are misspelt.

Key Points

• The word 'Valedictory' refers to a farewell or an address given at a graduation ceremony; it is used to describe something that serves as an expression of goodbye. (विदाई संबंधी)
• Example: She was honored to deliver the valedictory speech during the graduation ceremony.
• Upon careful examination of the provided options—'Voracious', 'Valedictory', 'Vivacious', and 'Vindictive'—it is observed that all four words are spelled correctly according to standard English dictionaries.
• As every word in the list is spelled correctly, there is no misspelt word among the choices given.

Therefore, the correct answer is: None of the options are misspelt.

Additional Information

Here are the definitions and Hindi meanings for the other correctly spelled options:

• Voracious (अति-उत्सुक/पेटू): Engaging in an activity with great eagerness or having a huge appetite for food.
• Example: He has a voracious appetite for reading and often finishes a novel in a single day.
• Vivacious (जीवंत): Someone, especially a person's behavior, that is attractively lively and animated.
• Example: Her vivacious personality and constant energy made her the life of the party.
• Vindictive (प्रतिशोधी): Having or showing a strong or unreasoning desire for revenge.
• Example: The king was known to be vindictive toward anyone who dared to challenge his authority.

The correct answer is: Depart.

Key Points

• The word 'stay' refers to the act of remaining in a particular place or continuing in a specific state; it implies not leaving or moving away. (ठहरना)
• Example: We decided to stay at a small cottage near the lake for our vacation.
• 'Depart' means to leave a place, typically to start a journey; it represents the action of going away, which is the direct opposite of remaining or staying. (प्रस्थान करना)
• Example: The international flight is scheduled to depart from the airport at midnight.
• Hence, we can infer that the most appropriate antonym of 'stay' is 'depart'.

Therefore, the correct answer is: Depart.

Additional Information

Here are the other options explained along with their Hindi meanings and example sentences:

• Settle (बसना): To establish a permanent home or to resolve a particular situation or dispute.
• Example: After years of traveling, they finally decided to settle in a quiet town.
• Delay (देरी करना): To make someone or something late or to postpone an event until a later time.
• Example: The heavy fog caused a significant delay in the morning commute.
• Reside (निवास करना): To live or have one's home in a specific place for a long period.
• Example: Many researchers reside on the island to study the local wildlife.

The correct answer is: Director.

Key Points

• The phrase 'supervises the making of a film' refers to the role of an individual who oversees the artistic and technical aspects of a movie production, ensuring that the script is translated into a visual performance. (फिल्म निर्माण की देखरेख करने वाला)
• Example: In the film industry, the task of the person who supervises the making of a film is to guide the actors and the camera crew to achieve a specific vision.
• 'Director' is the specific term for a person who manages the creative direction of a film, play, or television show, including controlling the acting, visuals, and sound. (निर्देशक)
• Example: The Director shouted 'Action!' as the lead actor began his emotional monologue on the set.
• Hence, we can infer that the most suitable one-word substitution for the given phrase is 'Director'.

Therefore, the correct answer is- Director.

Additional Information

Here are the other options explained along with their Hindi meanings and example sentences:

• Producer (निर्माता): A person who handles the financial and logistical management of a film production.
• Example: The Producer spent months raising funds and hiring the staff necessary to begin filming the documentary.
• Editor (संपादक): A person responsible for selecting and assembling recorded footage into a finished product.
• Example: After filming was complete, the Editor worked in the studio to cut the scenes together for the final version of the movie.
• Choreographer (नृत्य निर्देशक): A person who designs and coordinates dance sequences or complex physical movements in a production.
• Example: The Choreographer spent weeks training the background dancers for the grand musical finale of the film.

The correct answer is: Welter.

Key Points

• The phrase 'A large and confused mass of things' refers to a state where numerous items are jumbled, disordered, or muddled together without any specific order. (वस्तुओं का भारी और अस्त-व्यस्त ढेर)
• Example: The attic was filled with a large and confused mass of things collected by the family over several decades.
• 'Welter' refers to a large and confused number or mass of something, often used to describe a state of turmoil or chaos. (अव्यवस्था/ढेर)
• Example: The students had to navigate through a welter of confusing rules and regulations.
• Hence, we can infer that the most suitable one-word substitution for the given phrase is 'welter'.

Therefore, the correct answer is: Welter.

Additional Information

Here are the other options explained along with their Hindi meanings and example sentences:

• Peri (परी): In Persian mythology, a beautiful and benevolent supernatural being or fairy.
• Example: In the ancient legends, a peri would often guide lost travelers to safety.
• Jeopardy (खतरा): The state of being in danger of loss, harm, or failure.
• Example: The lack of proper maintenance put the safety of the entire building in jeopardy.
• Archetype (आद्यरूप): A very typical or perfect example of a certain person or thing; an original model.
• Example: The character of the brave hero is a classic archetype found in the myths of almost every culture.

The correct answer is 'by'.

 

Key Points

• The phrase 'learn by heart' is a common idiomatic expression in the English language.
• It means to memorize something so thoroughly that it can be recited or written from memory without looking at the source.
• In the sentence, Madhusudan is in the process of memorizing poems, so the preposition 'by' is the only grammatically and idiomatically correct choice.

Therefore, the correct answer is Option 4.

 

Complete Sentence: 'Madhusudan is learning the poems by heart.'

 

Additional Information

• Option 1: 'through' is used to indicate moving from one side to another or the means of completing a task, but it does not form a standard idiom with 'heart'.
• Option 3: 'on' usually refers to the position of something on a surface or specific dates/days. It is incorrect in the context of memorization.
• The word 'heart' in this idiom historically refers to the heart being the seat of memory and emotion.

The correct answer is Fine dresses are stitched by her for the queen.

Key Points

• The original sentence 'She stitches fine dresses for the queen' is in the Simple Present Tense, identified by the verb stitches (V1+s).
• In Active Voice, the structure is: Subject (She) + Verb (stitches) + Object (fine dresses) + Prepositional Phrase (for the queen).
• To convert Simple Present into Passive Voice, the rule is: Object + is/am/are + Past Participle (V3) + by + Subject.
• The Object 'fine dresses' is plural, so the auxiliary verb are must be used to maintain subject-verb agreement.
• The Past Participle or V3 form of the verb 'stitch' is stitched.
• The Subject pronoun 'She' is transformed into its objective case 'her' when placed after the preposition 'by'.
• The phrase 'for the queen' remains as an adjunct or secondary object in the sentence, typically following the main passive construction.

 Additional Information

• Tense Mismatch:
• Options using were stitched represent the Simple Past Passive tense. These are incorrect because the active sentence is in the Present Tense. The tense of the sentence must remain consistent during voice conversion.
• Verb Form Error:
• A fundamental rule of Passive Voice across all tenses is the mandatory use of the Past Participle (V3) form. Phrases like 'are stitch' are grammatically invalid in passive constructions.
• Voice Definition:
• Passive Voice is used when the focus is on the action or the receiver of the action (the dresses) rather than the performer (she).

The correct answer is The aviation authority has introduced a new set of safety regulations across all domestic airports..

Key Points

• The original sentence is in the Passive Voice and uses the Present Perfect Tense, as evidenced by the auxiliary structure has been followed by the past participle verb introduced.
• To convert a sentence from passive to active voice, the agent mentioned after the preposition by (the aviation authority) must become the grammatical subject of the new sentence.
• The Present Perfect Active voice follows the specific syntax: Subject + has/have + V3 (Past Participle) + Object. Since the aviation authority is a singular noun, the auxiliary has is retained.
• The patient or receiver of the action in the passive sentence (a new set of safety regulations) shifts to the object position in the active construction.
• The phrase across all domestic airports serves as an adverbial adjunct of place and remains positioned at the end of the sentence to maintain the original context and flow.
• By combining these elements, the sentence becomes: The aviation authority (Subject) + has introduced (Verb) + a new set of safety regulations (Object) + across all domestic airports (Place).

 Additional Information

• Understanding Tense Variations:
• Simple Present Tense: Option 1 uses introduces, which denotes a routine or universal fact, failing to match the completed action aspect of has been introduced.
• Simple Past Tense: Option 2 uses introduced. While it signifies a completed action, it lacks the present relevance or connection implied by the Perfect Tense.
• Simple Future Tense: Option 4 uses will introduce, which incorrectly shifts the timeline of the action to a future occurrence that has not yet happened.
• Voice Conversion Fundamentals:
• In Active Voice, the subject performs the action. It is often more direct, concise, and authoritative in professional writing.
• In Passive Voice, the subject receives the action. It is typically used when the action itself or the receiver is more important than the person or entity performing it.

The correct answer is 'into'.

 

Key Points

• The verb enter is followed by the preposition into when it refers to formally beginning or becoming involved in something such as an agreement, treaty, contract, or negotiation.
• The phrase entered into an agreement is a standard idiomatic expression used in legal and formal contexts.
• When enter is used to describe physical movement (e.g., walking into a room), no preposition is used (e.g., 'He entered the hall').

Therefore, the correct answer is Option 1.

 

Complete Sentence: 'India has just entered into an agreement with Russia.'

 

Additional Information

• Option 2: 'for' is incorrect because it does not form the required phrasal verb to signify participation in a pact.
• Option 3: 'in' is grammatically incorrect in this context; into is necessary to show the transition into a state or agreement.
• Option 4: 'to' is not used with enter to mean signing or joining an agreement.

The correct answer is Option 2.

 

Key Points

• The primary grammatical error in the underlined part is the incorrect use of the preposition 'since' with a duration of time.
• In English grammar, 'since' is used to refer to a specific point in time (e.g., 4 o'clock, Monday, or last year).
• On the other hand, 'for' is used to describe a period or duration of time (e.g., two hours, ten minutes, or five days).
• The phrase 'two hr' (two hours) represents a duration, so it must be preceded by 'for' instead of 'since'.
• The structure 'wait for someone to arrive' is the standard idiomatic way to express expectation in this context.

Therefore, the correct answer is Option 2.

 

Correct Sentence: 'The members of the club have been waiting eagerly for the chief guest to arrive for two hr.'

 

Additional Information

• Option 1: Incorrectly uses 'to' after the verb wait (which usually takes 'for') and fails to fix the 'since' error.
• Option 3: Uses 'from', which is generally used to indicate the starting point of an action but is not the standard preposition for expressing a total duration in the Present Perfect Continuous tense.
• Option 4: Is incorrect because the original sentence uses 'since' wrongly for a measurement of time.

The correct answer is Option 2.

Key Points

• The paragraph describes a character observing the approach to land from a ship and the subsequent arrival of another character, Mrs Davidson.
• Sentence C follows S1 as it captures the character's immediate reaction to the land mentioned in the first sentence:
• 'He looked at it with greedy eyes.' (Here, 'it' refers back to the land introduced in S1).
• Sentence A follows C by beginning the physical description of the scenery the character is observing:
• 'There was a thin strip of silver beach rising quickly to hills covered to the top with luxuriant vegetation.'
• Sentence B continues the description of the landscape, providing more specific details:
• 'The coconut trees, thick and green, came nearly to the water's edge, and among them you saw the grass houses of the Samoans; and here and there, gleaming white, a little church.'
• Sentence D is the fourth sentence as it introduces a new character into the scene:
• 'Mrs Davidson came and stood beside him.'
• Sentence S2 is the final sentence (fixed), providing a physical description of the character introduced in Sentence D:
• 'She was dressed in black and wore round her neck a gold chain, from which dangled a small cross.' (The pronoun 'She' logically refers back to Mrs Davidson).
• The correct sequence is CABD.

Coherent paragraph after rearrangement:

'When he came on deck next morning they were close to land. He looked at it with greedy eyes. There was a thin strip of silver beach rising quickly to hills covered to the top with luxuriant vegetation. The coconut trees, thick and green, came nearly to the water's edge, and among them you saw the grass houses of the Samoans; and here and there, gleaming white, a little church. Mrs Davidson came and stood beside him. She was dressed in black and wore round her neck a gold chain, from which dangled a small cross.'

The correct answer is Option 1.

 

Key Points

• The primary error in the underlined part is the omission of an article before the noun position.
• In English grammar, a singular countable noun (like position, car, or book) generally requires a determiner, such as the indefinite article a or an, when it is used in a non-specific context.
• The phrase secure a position is a standard idiomatic expression used to describe obtaining a job or a role.
• Therefore, the sentence needs the article a to be grammatically complete and correct.

Therefore, the correct answer is he was unable to secure a position.

 

Correct Sentence: 'Despite being one of the leading experts in his field, he was unable to secure a position at the prestigious university.'

 

Additional Information

• Option 2: 'he was unable to secure some position' – While some can be used with singular nouns to indicate an unspecified thing, it is less common and less formal than using a in this specific context.
• Option 3: 'he was unable to secure one position' – Using one emphasizes the numerical value (quantity), which is not the intended meaning of the sentence. The focus is on the failure to get any job, not specifically only one.
• Option 4: 'No improvement required' – This is incorrect because secure position is ungrammatical without a determiner.

The correct answer is 'called'.

Key Points

• The passage discusses the historical development of ancient civilizations and their contributions to writing and architecture.
• In blank A, the sentence refers to the specific name given to the first known form of writing developed by the Sumerians.
• 'Called' is used as a past participle in a reduced relative clause (meaning 'which was called'), which is the standard way to provide the name or designation of a noun.
• Using 'called' correctly identifies 'cuneiform' as the title of the writing system mentioned.

Therefore, the correct answer is 'Option 1'.

Complete Passage: The ancient civilizations of Mesopotamia, Egypt, and the Indus Valley were among the first to develop complex societies, relying on agriculture as the cornerstone of their economies. In Mesopotamia, the Sumerians created the first known form of writing, 1. called cuneiform, which was inscribed on clay tablets. This form of communication enabled the recording of important events, laws, and even trade transactions, 2. establishing the foundation for future generations to understand their past. In Ancient Egypt, the great pyramids stand as a testament to the engineering prowess of the civilization. The construction of these monumental structures required careful planning and 3. a skilled workforce. However, much of the wealth generated through agriculture and conquest was concentrated in the hands of the elite, which led to the emergence of 4. disparity between the ruling class and the common people. Similarly, the Indus Valley Civilization, known for its advanced urban planning, fell into decline for reasons that remain 5. unclear. Some scholars argue that environmental factors, such as shifts in river patterns, may have played a significant role in the civilization's collapse. Nevertheless, the achievements of these early societies paved the way for future innovations in science, technology, and governance.

Additional Information

• Calling: This is a present participle and would imply the writing system itself is performing the action of calling something, which is logically incorrect.
• Call: This is a base verb form and cannot function as an adjective or a reduced relative clause without a subject or auxiliary verb.
• Have called: This is a perfect tense form that requires a subject and does not fit the grammatical structure of the sentence modifying the noun 'writing'.

The correct answer is 'establishing'.

Key Points

• The sentence discusses how the recording of events and laws through cuneiform writing served as a base for future generations.
• The appropriate word should indicate the act of setting up or creating a base for something.
• 'Establishing' means to set up on a firm or permanent basis. It perfectly fits the phrase 'establishing the foundation', which implies creating the groundwork for future knowledge.
• Other options like 'demolition' (destruction), 'analyzing' (examining), and 'strengthening' (making stronger) do not fit as logically as creating a starting point (foundation).

Therefore, the correct answer is 'Option 1'.

Complete Passage: The ancient civilizations of Mesopotamia, Egypt, and the Indus Valley were among the first to develop complex societies, relying on agriculture as the cornerstone of their economies. In Mesopotamia, the Sumerians created the first known form of writing, 1. called cuneiform, which was inscribed on clay tablets. This form of communication enabled the recording of important events, laws, and even trade transactions, 2. establishing the foundation for future generations to understand their past. In Ancient Egypt, the great pyramids stand as a testament to the engineering prowess of the civilization. The construction of these monumental structures required careful planning and 3. a skilled workforce. However, much of the wealth generated through agriculture and conquest was concentrated in the hands of the elite, which led to the emergence of 4. disparity between the ruling class and the common people. Similarly, the Indus Valley Civilization, known for its advanced urban planning, fell into decline for reasons that remain 5. unclear. Some scholars argue that environmental factors, such as shifts in river patterns, may have played a significant role in the civilization's collapse. Nevertheless, the achievements of these early societies paved the way for future innovations in science, technology, and governance.

Additional Information

• Demolition: The action or process of demolishing or being demolished (e.g., pulling down a building).
• Analyzing: To examine something methodically and in detail.
• Strengthening: To make or become stronger.

The correct answer is 'a'.

Key Points

• The sentence requires an article to precede the noun phrase 'skilled workforce'.
• The noun 'workforce' is a singular countable noun in this context, and it is being described generally as a requirement for the construction.
• The adjective 'skilled' begins with a consonant sound (/s/).
• The indefinite article 'a' is used before words that begin with a consonant sound, while 'an' is used before words that begin with a vowel sound.
• Therefore, 'a' is the grammatically correct choice to complete the phrase 'a skilled workforce'.

Therefore, the correct answer is 'Option 3'.

Complete Passage: The ancient civilizations of Mesopotamia, Egypt, and the Indus Valley were among the first to develop complex societies, relying on agriculture as the cornerstone of their economies. In Mesopotamia, the Sumerians created the first known form of writing, 1. called cuneiform, which was inscribed on clay tablets. This form of communication enabled the recording of important events, laws, and even trade transactions, 2. establishing the foundation for future generations to understand their past. In Ancient Egypt, the great pyramids stand as a testament to the engineering prowess of the civilization. The construction of these monumental structures required careful planning and 3. a skilled workforce. However, much of the wealth generated through agriculture and conquest was concentrated in the hands of the elite, which led to the emergence of 4. disparity between the ruling class and the common people. Similarly, the Indus Valley Civilization, known for its advanced urban planning, fell into decline for reasons that remain 5. unclear. Some scholars argue that environmental factors, such as shifts in river patterns, may have played a significant role in the civilization's collapse. Nevertheless, the achievements of these early societies paved the way for future innovations in science, technology, and governance.

Additional Information

• An: Used before singular countable nouns starting with a vowel sound (e.g., an engineer, an ancient city).
• The: The definite article is used when referring to a specific noun already mentioned or known to the reader (e.g., the workforce that built the Giza pyramid). In the target sentence, the requirement is stated more generally.
• No article: Typically used for plural nouns or uncountable nouns when speaking in generalities, but 'workforce' here functions as a specific singular unit.

The correct answer is 'disparity'.

Key Points

• The passage discusses the social structures and economic foundations of early civilizations like Mesopotamia, Ancient Egypt, and the Indus Valley.
• The sentence indicates that wealth was concentrated in the hands of the elite, which naturally creates a gap or inequality between social classes.
• 'Disparity' is the most suitable noun as it refers to a great difference or imbalance, especially regarding wealth and status.
• Other options like 'harmony', 'equality', and 'concord' represent balance or agreement, which contradicts the context of wealth being concentrated in only one group.

Therefore, the correct answer is 'Option 2'.

Complete Passage: The ancient civilizations of Mesopotamia, Egypt, and the Indus Valley were among the first to develop complex societies, relying on agriculture as the cornerstone of their economies. In Mesopotamia, the Sumerians created the first known form of writing, 1. called cuneiform, which was inscribed on clay tablets. This form of communication enabled the recording of important events, laws, and even trade transactions, 2. establishing the foundation for future generations to understand their past. In Ancient Egypt, the great pyramids stand as a testament to the engineering prowess of the civilization. The construction of these monumental structures required careful planning and 3. a skilled workforce. However, much of the wealth generated through agriculture and conquest was concentrated in the hands of the elite, which led to the emergence of 4. disparity between the ruling class and the common people. Similarly, the Indus Valley Civilization, known for its advanced urban planning, fell into decline for reasons that remain 5. unclear. Some scholars argue that environmental factors, such as shifts in river patterns, may have played a significant role in the civilization's collapse. Nevertheless, the achievements of these early societies paved the way for future innovations in science, technology, and governance.

Additional Information

• Harmony: A state of agreement or peaceful coexistence, which does not fit the context of social inequality.
• Equality: The state of being equal, especially in status, rights, and opportunities; the passage describes the opposite of this.
• Concord: Agreement or harmony between people or groups, which is inappropriate for describing a wealth gap.

The correct answer is 'unclear'.

Key Points

• The sentence discusses the decline of the Indus Valley Civilization and the historical uncertainty surrounding it.
• The word 'remain' suggests a continuing state or condition. In historical contexts, when the exact cause of an event is not definitively known or agreed upon by experts, it is said to be 'unclear'.
• The context provided by the next sentence, 'Some scholars argue...', indicates that there is no singular, proven reason, but rather various theories, which confirms the reasons are currently uncertain or vague.
• 'Unclear' means not easy to understand, not certain, or not definite, which perfectly fits the context of historical mysteries.

Therefore, the correct answer is 'Option 3'.

Complete Passage: The ancient civilizations of Mesopotamia, Egypt, and the Indus Valley were among the first to develop complex societies, relying on agriculture as the cornerstone of their economies. In Mesopotamia, the Sumerians created the first known form of writing, 1. called cuneiform, which was inscribed on clay tablets. This form of communication enabled the recording of important events, laws, and even trade transactions, 2. establishing the foundation for future generations to understand their past. In Ancient Egypt, the great pyramids stand as a testament to the engineering prowess of the civilization. The construction of these monumental structures required careful planning and 3. a skilled workforce. However, much of the wealth generated through agriculture and conquest was concentrated in the hands of the elite, which led to the emergence of 4. disparity between the ruling class and the common people. Similarly, the Indus Valley Civilization, known for its advanced urban planning, fell into decline for reasons that remain 5. unclear. Some scholars argue that environmental factors, such as shifts in river patterns, may have played a significant role in the civilization's collapse. Nevertheless, the achievements of these early societies paved the way for future innovations in science, technology, and governance.

Additional Information

• 'Clear' (स्पष्ट): Means easy to perceive or understand; this would imply the cause of the decline is definitely known.
• 'Cleared' (साफ किया हुआ): Refers to removing obstacles or having been authorized/passed; it does not fit the context of historical reasons.
• 'Uncleared' (अशोधित/जो साफ न किया गया हो): Usually refers to items not removed or debts not paid; it is irrelevant to describing the nature of historical knowledge.