Question

Which is a primary lymphoid organ?

• A. Bone marrow and spleen
• B. Spleen and thymus
• C. Bone marrow and tonsils
• D. Thymus gland and bone marrow

Answer 1

The correct option is D Thymus gland and bone marrow

Primary lymphoid organs are those, where lymphocytes are formed and mature. They provide an environment for the stem cells to divide and mature in B or T- cells.
There are two primary lymphoid organs, as the bone marrow and the thymus gland.
Thus, the correct answer is option (D).