Question:

The four sentences (labelled 1, 2, 3, and 4) given below, when properly sequenced, would yield a coherent paragraph. Decide on the proper sequencing of the order of the sentences and key in the sequence of the four numbers as your answer.
1. As books age, the cellulose and lignin in the paper begin to break down, releasing a mix of volatile organic compounds into the air.
2. Old books carry a scent that many people instantly recognize—and even love.
3. These compounds are benzaldehyde, which gives off an almond-like scent, vanillin, which smells like vanilla, ethyl hexanol (floral scent), toluene (sweet), and furfural (which has a slightly bready scent).
4. This familiar aroma isn’t just dust or mildew; it’s actually a result of slow chemical changes happening inside the paper and ink.

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When sequencing sentences, focus on the natural flow of ideas, ensuring that each sentence logically connects to the next.
Updated On: Jul 1, 2026
  • Option 2
  • Option 4
  • Option 1
  • Option 3
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The Correct Option is B

Approach Solution - 1

Approach: Sequence by finding the opener that introduces the topic generally, then follow the “general → specific” drilldown. The subject is the smell of old books and its chemical cause.

Step 1 — Pick the opener: Sentence 2 — “Old books carry a scent that many people instantly recognize—and even love” — is the only true topic sentence; it names the phenomenon without assuming anything before it. So the paragraph begins with 2.

Step 2 — Find what answers “why”: Sentence 4 — “This familiar aroma isn’t just dust or mildew; it’s actually a result of slow chemical changes...” — “This familiar aroma” directly refers back to the scent in 2 and reframes its cause as chemistry. So 2→4.

Step 3 — Detail the chemistry: Sentence 1 — “As books age, the cellulose and lignin... break down, releasing... volatile organic compounds” — spells out the chemical change announced in 4. So 2→4→1.

Step 4 — List the specifics: Sentence 3 — “These compounds are benzaldehyde... vanillin... furfural...” — “These compounds” points straight back to the VOCs in 1 and names them. So it closes the chain: 2→4→1→3.

Step 5 — Confirm the cohesion chain: “This familiar aroma” (4← the scent in 2) and “These compounds” (3← the VOCs in 1) are the two anchor links that fix the order beyond doubt.

Final answer: The sequence is 2-4-1-3, i.e. Option 4.
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Approach Solution -2

Step 1: Understanding the Passage:
The passage talks about the process by which old books produce a distinctive scent due to the breakdown of materials in the paper.
Step 2: Analyzing the Options:
- (1) Option 2: This sentence fits naturally as an opening statement, introducing the aroma of old books.
- (2) Option 4: This sentence follows the previous one by explaining that the aroma is not due to dust or mildew but is the result of chemical processes.
- (3) Option 1: This provides further details on how the scent is produced by the breakdown of cellulose and lignin.
- (4) Option 3: This fits as the final sentence, explaining the compounds involved in the smell.
Step 3: Conclusion:
Option (2) is the best choice as it logically completes the sequence by describing the chemical changes inside books.
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