Amyloid: practice question

A Pathology 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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Pathology · Amyloid

Sample item

What stain shows apple-green birefringence?

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

The answer and the reasoning

D. Congo red

This item reviews Amyloid; Congo red is the best answer because it directly matches the biochemical or pathological mechanism described.

Option by option

  • A. Giemsa

    Giemsa is plausible but not the best answer.

  • B. Gram

    Gram does not fit the stated mechanism.

  • C. Ziehl-Neelsen

    Ziehl-Neelsen is unsupported by the key finding.

  • D. Congo red (correct)

    Correct. Congo red fits the defining feature.

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.

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Questions about this Pathology question

What is the answer to this Pathology question?

The best answer is D, Congo red. This item reviews Amyloid; Congo red is the best answer because it directly matches the biochemical or pathological mechanism described.

Why is "Giemsa" not the answer?

Giemsa is plausible but not the best answer.

Why is "Gram" not the answer?

Gram does not fit the stated mechanism.

Why is "Ziehl-Neelsen" not the answer?

Ziehl-Neelsen is unsupported by the key finding.

What concept does this question test?

It tests Amyloid in Pathology. The correct option holds because: Correct. Congo red fits the defining feature.

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 Amyloid?

Learn each disease as a bundle: cause, key histology, markers, and the clinical hallmark. Then use the flashcards and the other Pathology 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.