Mark the odd one in each series and select the correct option

a) Spermatocyte, polar body, spermatid, spermatogonium

b) Endometrium, corpus luteum, acrosome, Graafian follicle

c) Vas deferens, mons pubis, epididymis, Cowper’s gland

(a) Polar body is related to oogenesis; others are the stages of spermatogenesis.

(b) Acrosome is the structure in the sperm; others are the structures of the female reproductive system.

(c) Mons pubis is a part of the female external genitalia; the rest are the parts of the male reproductive system.