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[A]: Lymphocytes develop in lymphoid tis...

[A]: Lymphocytes develop in lymphoid tissue and involved in cell mediated and humeral immunity.
[R]: Lymphocytes are produced in primary lymphoid tissue (thymus, embryonic liver and adult bone narrow) and migrate to secondary lymphoid tissue (spleen and lymphnodes)

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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The correct Answer is:
A
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[A] : Lymphocytes arise from bone marrow and present in the blood, lymph and connective tissues. [R]: Lymphocytes migrate to thymus. where they develop into T cells and begin to mature.

[A] : Macrophage is a large amoeboid cell that can engulf, ingest and destroy bacteria, dam- aged cells and worn-out red blood cells. This process is called phagocytosis and is an im- portant part of the body s defence against disease. [R]: Macrophages are found free (wandering) in the tissues, in connective tissue) as histio- cytes), in the lining of the blood sinusoids of the liver (as Kupffer cells), and in lymphoid tissue. They make up the reticulo-endothelial system.

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