Environmental health: 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 · Environmental health

Sample item

What is the most reliable household measure for microbiologically unsafe drinking water during an emergency?

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

The answer and the reasoning

D. Boiling

This Environmental health item is resolved by the defining principle: Boiling best matches the stated finding or public-health measure.

Option by option

  • A. Storing in sunlight only

    Storing in sunlight only does not explain the finding or provide the indicated intervention.

  • B. Cooling overnight

    Cooling overnight may be relevant elsewhere, but it conflicts with the central fact given here.

  • C. Adding sugar

    Adding sugar is not the best fit because it does not establish the requested environmental health conclusion.

  • D. Boiling (correct)

    Correct. Boiling directly addresses the key clue in this scenario.

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 D, Boiling. This Environmental health item is resolved by the defining principle: Boiling best matches the stated finding or public-health measure.

Why is "Storing in sunlight only" not the answer?

Storing in sunlight only does not explain the finding or provide the indicated intervention.

Why is "Cooling overnight" not the answer?

Cooling overnight may be relevant elsewhere, but it conflicts with the central fact given here.

Why is "Adding sugar" not the answer?

Adding sugar is not the best fit because it does not establish the requested environmental health conclusion.

What concept does this question test?

It tests Environmental health in PSM. The correct option holds because: Correct. Boiling directly addresses the key clue in this scenario.

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 Environmental health?

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.