Which of the following organs are primary lym | vedclass

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(D) Primary lymphoid organs are the sites where lymphocytes originate and/or mature and differentiate into antigen-specific lymphocytes.In humans,the

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Both $A$ and $B$

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(D) Primary lymphoid organs are the sites where lymphocytes originate and/or mature and differentiate into antigen-specific lymphocytes.In humans,the bone marrow and thymus are the primary lymphoid organs.In the bone marrow,all blood cells including lymphocytes are produced.In the thymus,$T$-lymphocytes mature.Spleen is a secondary lymphoid organ where lymphocytes interact with the antigen and then proliferate to become effector cells.

Which of the following organs are primary lymphoid organs?

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