Which one of the following is NOT the function of Leydig cells?

The correct answer is Option (4) → Stimulate secretion of some factors which help in the process of Spermiogenesis

Note: The given answer is as per the official NTA Answer Key. However, the question can have more than one correct answer, i.e. both Option (3) and Option (4), as explained below.

Option (1) Synthesis Androgens — A function of Leydig cells. NCERT says Leydig cells synthesise the testicular hormones called androgens.

Option (2) Secretes Androgens — A function of Leydig cells. The androgens the Leydig cells make are secreted by the same cells; NCERT says they synthesise and secrete them.

Option (3) Immunologically competent cells are present in it — Not a function of Leydig cells (also correct). NCERT only says that other immunologically competent cells are also present in the interstitial spaces, where the Leydig cells lie. This describes what the spaces contain; it is not a job the Leydig cells do.

Option (4) Stimulate secretion of some factors which help in the process of Spermiogenesis — Not a function of Leydig cells. This is the answer given by NTA. FSH acts on the Sertoli cells, which secrete the factors that help in spermiogenesis.

NCERT Extract:
The Male Reproductive System – “… Each seminiferous tubule is lined on its inside by two types of cells called male germ cells (spermatogonia) and Sertoli cells (Figure 2.2 ). The male germ cells undergo meiotic divisions finally leading to sperm formation, while Sertoli cells provide nutrition to the germ cells. The regions outside the seminiferous tubules called interstitial spaces, contain small blood vessels and interstitial cells or Leydig cells (Figure 2.2). Leydig cells synthesise and secrete testicular hormones called androgens. Other immunologically competent cells are also present.”