Which of the following organ, is not involved in 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
In an animal, the immune system is a system of many biological structures that protects them against the diseases.The main components of the immune system are the thymus, spleen, Lymph Nodes, bone marrow and white blood cells. A brain is not involved in elicitation of immune response but regulates the function of the whole body. Hence option A is correct.

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