The correct option is D Both II and IV
Diploid cells have two sets of chromosomes.
Zygote is a diploid cell formed by the fusion of two haploid cells, sperm and ovum.
Spermatogonia are diploid germ cells that produce the gametes.
Primary spermatocyte is formed due to differentiation of spermatogonium and hence is diploid.
Haploid cells have a single set of chromosomes.
Spermatozoa (sperms) are haploid cells, male gametes.