The correct option is D Nurse cells
Sertoli
cells occur in human testes. Each lobule of testes contains one to three
seminiferous tubules in which the sperms are produced. Each seminiferous tubule
is lined on its inside by two types of cells called male germ cells
(spermatogonia) and sertoli cells. Sertoli cells are also called nurse cells
because they provide nutrition to spermatozoa. Spermatozoa are developing
sperms. Heads of spermatozoa are embedded in the sertoli cells.