Question

Select the option having all the correct characteristics:–

	Structure	Percentage	Function
(A)		0.3 – 0.5	Phagocytic
(B)		0.5 – 1.0	Secrete histamine and serotonin
(C)		30 – 40	Defense against parasites
(D)		30 – 40	Allergic reactions

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is B B

The structure in option (b) is of a basophil. Basophils are granular WBCs and are the least (0.5–1 percent) of the total WBCs. They secrete histamine, serotonin, heparin, and are involved in inflammatory reactions.
Structure in (a) is neutrophil which makes 40-70% of total WBCs.
Structure in (c) is eosinophil which makes 1-6% of total WBCs.
Structure in (d) is lymphocyte which are responsible for immune response in the body.

So, the correct answer is option 'b'.