Answer:
B. Seminiferous tubules
Step-by-step explanation:
Seminiferous tubules are the coils within the testes where sperm form and are then transported from here to the male genital tract.
Prepuce is just a fold of skin over the glans penis
gland penis is the terminal portion of penis with no role in formation of sperms
seminal vesicles are the glands responsible for secreting seminal fluid which is a component of ejaculate/semen