Water: practice question

A PSM 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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PSM · Water

Sample item

Why measure residual chlorine?

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

The answer and the reasoning

A. Confirm disinfection

This item reviews Water; Confirm disinfection is the best answer because it directly fits the forensic or public-health principle described.

Option by option

  • A. Confirm disinfection (correct)

    Correct. Confirm disinfection is supported by the defining principle.

  • B. Measure hardness

    Measure hardness does not match the stated scenario.

  • C. Measure anemia

    Measure anemia is not supported by the key finding.

  • D. Measure fertility

    Measure fertility is plausible but not the single best answer.

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 PSM questions

Questions about this PSM question

What is the answer to this PSM question?

The best answer is A, Confirm disinfection. This item reviews Water; Confirm disinfection is the best answer because it directly fits the forensic or public-health principle described.

Why is "Measure hardness" not the answer?

Measure hardness does not match the stated scenario.

Why is "Measure anemia" not the answer?

Measure anemia is not supported by the key finding.

Why is "Measure fertility" not the answer?

Measure fertility is plausible but not the single best answer.

What concept does this question test?

It tests Water in PSM. The correct option holds because: Correct. Confirm disinfection is supported by the defining principle.

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 Water?

Practise biostatistics with small calculations until sensitivity, predictive values and risk measures are automatic. Then use the flashcards and the other PSM 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.