Question

Assertion (A): In human beings, the respiratory pigment is haemoglobin present in red blood cells.

Reason (R): Haemoglobin has a very high affinity for carbon dioxide.

Options

• Both, Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

• Both, Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation ofthe Assertion (А).

• Assertion (A) is true, but Reason (R) is false.

• Assertion (A) is false, but Reason (R) is true.

Answer 1

Assertion (A) is true, but Reason (R) is false.

Explanation:

Haemoglobin is the respiratory pigment present in red blood cells and carries oxygen, so the assertion is true. However, haemoglobin has a higher affinity for oxygen (and carbon monoxide), not carbon dioxide, so the Reason is false.