Question

human sperm
a have twenty - three chromosomes
b are diploid
c secrete testosterone

Explanation:

• Human sperm are haploid cells (not diploid as in option B). Haploid cells have half the number of chromosomes as diploid cells. In humans, diploid cells (like somatic cells) have 46 chromosomes. So, sperm (and eggs) have 23 chromosomes (option A is correct).
• Testosterone is secreted by Leydig cells in the testes, not by sperm (so option C is incorrect).

Answer:

A. have twenty - three chromosomes