Answer:
The correct option is d. Serves as the site of T lymphocyte maturation
Explanation:
Thymus, a specialized primary organ of the nervous system, is a part of the lymphatic system. It is present in the upper front part of our chest, behind the sternum and between the lungs.
The thymus has two lobes, each containing a central medulla and a peripheral cortex surrounded by a outer capsule.
The main function of the thymus is the maturation of T cells or T lymphocytes and it occurs in the medulla of the thymus.
Therefore, the thymus provides a site for the T cells to mature.