Question

Choose the correct statements regarding bone marrow and thymus.

• A. Both are primary lymphoid organs
• B. Bone marrow is the site where B and T cells become antigen sensitive
• C. Thymus is the site of origin for B and T cells
• D. B cells become antigen sensitive in the Bone marrow while T cells become antigen sensitive in the Thymus

Answer 1

Answer: (A), (D)

B cells become antigen sensitive in the Bone marrow while T cells become antigen sensitive in the Thymus

Bone marrow and thymus are primary lymphoid organs. B cells and T cells both originate in the bone marrow. B cells acquire antigen sensitivity in the bone marrow itself while T cells become antigen sensitive in the thymus.