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Question
Secondary lymphoid organ is ______.
Options
lymph nodes
thymus
bone marrow
spleen
MCQ
Fill in the Blanks
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Solution
Secondary lymphoid organ is lymph nodes.
Explanation:
Lymph nodes are secondary lymphoid organs where lymphocytes encounter antigens. Thymus and bone marrow are primary organs; although the spleen is also secondary, the keyed choice here is lymph nodes.
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