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Railways PYQCBT 1 2016

RRB NTPC · Question 35

An Assertion (A) and a Reason (R) are given below. Assertion (A): It causes death when inhaled carbon monoxide. Reason (R): Carbon monoxide is added to hemoglobin. choose the right option. A. A is correct but R is false. B. A is false but R is correct. C. Both A and R are correct and R is the proper interpretation of A. D. Both A and R are correct but R is not a proper interpretation of A.

  1. A

  2. C

  3. D

  4. B

Show answer & explanation

Answer: (B) C

Explanation

Carbon monoxide binds to haemoglobin about 200 times more strongly than oxygen, forming carboxyhaemoglobin, so the blood cannot carry oxygen and inhaling it can kill. Both A and R are true and R explains A.