Question

Assertion (A): Cigarette smoking decreases the oxygen levels in blood. Reason (R): Carbon monoxide interferes with the transport of oxygen by the haemoglobin.

• A. Both (A) and (R) are true, (R) is the correct explanation for (A)
• B. Both (A) and (R) are true, (R) is not the correct explanation for (A)
• C. (A) is true, but (R) is false
• D. (A) is false, but (R) is true

Hint:

Carbon monoxide has about 200 times greater affinity for haemoglobin than oxygen.

Answer 1

The Correct Option is A