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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

Text Solution

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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 connec- tive 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, damaged cells and worn-out red blood cells. This process is called phagocytosis and is an important part of the body s defence against disease. [R]: Macrophages are found free (wandering) in the tissues, in connective tissue) as histiocytes), 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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