Question

Both B-cells and T-cells of immune system are produced in

• A. Spleen
• B. Lymphoid nodes
• C. Bone marrow
• D. Thymus

Answer 1

The correct option is C Bone marrow

Bone marrow is a semi-solid tissue which may be found within the spongy or cancellous portions of bones. Bone marrow is the primary site of new blood cell production or hematopoiesis. Bone marrow is considered as a primary lymphoid organ which is involved in the production and early clonal selection of lymphocyte tissues. Bone marrow is responsible for both the production of T cells and the production and maturation of B cells.

So, the correct answer is 'Bone marrow'.