The abnormal development of which of the following lymphoid organs would result in the most severe immunodeficiency?

Spleen

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Thymus

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Tonsil

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Lymph node

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Solution

The correct option is B Thymus
The primary lymphoid organs are the thymus gland and bone marrow which are involved in the production of lymphocyte tissue. The thymus gland is the site where the T cells mature. These T cells are the lymphocytes for the adaptive immune system. Any abnormal development of the thymus results in severe immunodeficiency making the individual highly susceptible to any form of infection.

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