The correct option is C Seminiferous tubules
The seminiferous tubules in testes are made up of germ cells, sertoli cell. During gametogenesis, germ cells or spermatogonia in seminiferous tubule produce immature sperm by the process of spermatogenesis. After spermatogenesis, mature sperms are finally released from the sertoli cells of seminiferous tubules by the process called as spermiation. Thus, the correct answer is option A.