Which order of types of cells below correctly reflects the sequence by which a sperm cell is produced?

This would be the order of types of cell in producing sperm (spermatogenesis):

1. Spermatogonium A

2. Spermatogonium B

3. Primary spermatocyte

4. Secondary spermatocyte

5. Spermatid

6. Sperm cell (spermatozoon)

The process from the formation of spermatogonium up to and including the secondary spermatocyte is called spermatocytogenesis.

The continuing process which includes maturation of the sperm cell, from the spermatid phase to the mature sperm cell is called spermiogenesis.