The correct answer is Option (4) -(A) and (C) only

The spermatogonia (sing. spermatogonium) present on the inside wall of seminiferous tubules multiply by mitotic division and increase in numbers. Each spermatogonium is diploid and contains 46 chromosomes.

A primary spermatocyte completes the first meiotic division (reduction division) leading to formation of two equal, haploid cells called secondary spermatocytes, which have only 23 chromosomes each. The secondary spermatocytes undergo the second meiotic division to produce four equal, haploid spermatids.The cell that typically contains 23 chromosomes is the spermatid.A spermatid is a haploid cell that arises from the process of spermatogenesis in males.

Oogenesis is initiated during the embryonic development stage when a couple of million gamete mother cells (oogonia) are formed within each fetal ovary. Each oogonium is diploid .

The haploid nucleus of the sperms and that of the ovum fuse together to form a diploid zygote.