The correct option is C spermatogenesis
Spermatogenesis is the development of immature diploid male germ cells called spermatogonia, found inside the seminiferous tubules, into mature haploid spermatozoa.
Spermiogenesis is the process by which spermatids develop into mature spermatozoa or sperms.
The process of release of mature spermatozoa from the seminiferous tubules is called spermiation.