MCQHard1 mark

Select the correct answers to the questions from the given options. (Do not copy the questions, write the correct answer only.)

Assertion (A): Leukoderma is the biological term for blood cancer. Reason (R): An abnormal increase in the number of WBCs causes blood cancer.

Topic: Assertion-Reason — leukoderma and leukaemia

Previous-year question practice database

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Pick an option and check your answer. The full worked answer is below either way.

Choose an answer

(A) is true and (R) is false(A) is false and (R) is trueBoth (A) and (R) are true and (R) is the correct explanation of (A)Both (A) and (R) are true but (R) is not the correct explanation of (A)

Answer

Exam answer

(A) is false and (R) is true.

Explanation

THE ASSERTION IS FALSE. Leukoderma (also called vitiligo) is a SKIN condition in which patches of skin lose their pigment and turn white, because the melanin-producing cells stop working. It has nothing to do with blood. Blood cancer is called LEUKAEMIA.

THE REASON IS TRUE. Leukaemia is characterised by an uncontrolled, abnormal increase in the number of white blood cells, which crowd out the normal blood cells.

So the assertion is false and the reason is true — option (B).

THE TRAP is the shared prefix. LEUK- or LEUCO- means "white", and it appears in three different words a student must keep apart: LEUCOCYTE — a white blood cell LEUKAEMIA — cancer of the white blood cells LEUKODERMA — white patches on the skin (derma = skin) Read the second half of the word: -aemia means blood, -derma means skin. That alone answers the question.

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