The correct option is (d) testis and testosterone.
Explanation:
The endocrine part of testis is formed of groups of cells, called interstitial cells or Leydig' cells, scattered in connective tissue between the **** producing seminiferous tubules of the testis.
These cells are stimulated to produce male *** hormones, called androgens by ICSH of anterior pituitary. Testosterone is main androgen and it is a steroid hormone.
