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Answer: C. Secondary spermatocytes
Step-by-step explanation:
The process by which the haploid sperm cell or spermatozoa develops from the germ or stem cells in males is called as spermatogenesis. The primary spermatocytes undergoes Meiosis I which get divided into two secondary spermatocytes then later the secondary spermatocyte undergoes Meiosis II to produce four spermatids. Each spermatids develop and mature to form the sperms.