Multiple choice

Which among the following are primary lymphoid organs?

  1. Thymus
  2. Bone marrow
  3. Spleen
  4. Lymph nodes
  5. Mucosa-associated lymphoid tissue

  1. 1 and 2

  2. 1, 2 and 4

  3. 2 and 3

  4. 2, 3 and 5

  5. 4 and 5
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A Correct answer
Explanation

The thymus and the bone marrow constitute the primary lymphoid tissues involved in the production and early selection of lymphocyte tissues. Thymus: Site of T Cell maturation Bone Marrow: Site of Haematopoiesis and B Cell maturation

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