Final answer:
The diploid cells in spermatogenesis are primary spermatocytes and spermatogonia.
Step-by-step explanation:
Of the options given, the diploid cells are:
- a) Primary spermatocyte : These diploid cells are the first stage of spermatogenesis and undergo meiosis I to become secondary spermatocytes.
- e) Spermatogonium : Spermatogonia are diploid cells that undergo mitosis to produce primary spermatocytes.