Question:

The importance of sleep is often overlooked by students when they are preparing for exams. Research has consistently shown that sleep deprivation greatly reduces the ability to recall the material learnt. Hence, cutting down on sleep to study longer hours can be counterproductive. Which one of the following statements is the CORRECT inference from the above passage?

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When a passage stresses consequences of ignoring something, the valid inference usually includes that element as essential.
  • Sleeping well alone is enough to prepare for an exam. Studying has lesser benefit.
  • Students are efficient and are not wrong in thinking that sleep is a waste of time.
  • If a student is extremely well prepared for an exam, he needs little or no sleep.
  • To do well in an exam, adequate sleep must be part of the preparation.
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The Correct Option is D

Solution and Explanation

The passage emphasizes that lack of sleep harms memory recall and that reducing sleep to study longer is counterproductive.

Step 1: Identify the key idea.
The passage does not claim that sleep alone is enough, nor that students are correct in thinking sleep is a waste. It also does not say that well-prepared students need no sleep.

Step 2: Choose the inference.
The only statement that aligns with the author's conclusion is that proper sleep must be included as part of exam preparation.

Final Answer: (D)

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