Vitamins: practice question

A Biochemistry question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Biochemistry · Vitamins

Sample item

Which vitamin deficiency causes night blindness?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Vitamin A

This item reviews Vitamins; Vitamin A is the best answer because it directly fits the mechanism or morphology described.

Option by option

  • A. Vitamin K

    Vitamin K is plausible but is not the best fit here.

  • B. Vitamin C

    Vitamin C is not supported by the stated finding.

  • C. Vitamin B1

    Vitamin B1 does not match the key mechanism or pattern.

  • D. Vitamin A (correct)

    Correct. Vitamin A is supported by the defining finding.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Biochemistry questions

Questions about this Biochemistry question

What is the answer to this Biochemistry question?

The best answer is D, Vitamin A. This item reviews Vitamins; Vitamin A is the best answer because it directly fits the mechanism or morphology described.

Why is "Vitamin K" not the answer?

Vitamin K is plausible but is not the best fit here.

Why is "Vitamin C" not the answer?

Vitamin C is not supported by the stated finding.

Why is "Vitamin B1" not the answer?

Vitamin B1 does not match the key mechanism or pattern.

What concept does this question test?

It tests Vitamins in Biochemistry. The correct option holds because: Correct. Vitamin A is supported by the defining finding.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Vitamins?

Build one table of enzyme deficiency, disease, inheritance and key finding, then revise it by spaced recall. Then use the flashcards and the other Biochemistry questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.