Answer: Option B.
A human sperm cell has 23 unpaired chromosomes.
Step-by-step explanation:
A human sperm cell Is the male reproductive cell. The human sex cell are the sperm which is the male sex cell and the ovum which is the female sex cell. Each sex cell have 23 unpaired chromosomes each. The sex cell are produced by a type of cell division called meiosis. When the male and the female sex cell fuse together, the form a zygote which has 2n chromosomes I.e 46 chromosomes.