Which of the following organs is not involved in the elicitation of immune response?

Brain

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Lymph nodes

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Spleen

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Thymus

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Solution

The correct option is A Brain
Lymph nodes, spleen and thymus are the lymphoid organs that filters or destroy the pathogen and thymus mature the immune cell i.e., T cell. Whereas brain is the part of the central nervous system that regulates the other body function.
Therefore, the correct answer is option A.

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