Correct option: (b) If both assertion and reason are true but reason is not the correct explanation of assertion.
Each seminiferous tubule is lined on its inside by two types - spermatogonia and Sertoli cells.
Spermatogonia undergo meiotic divisions finally to form sperms.
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's cells that synthesize and secrete testicular hormones called androgens (testosterone).