Which one of the following is not a male accessory gland?

The correct answer is Option (1) → Ampulla

The male accessory glands are the paired seminal vesicles, one prostate and the paired bulbourethral glands. Their secretions make up the seminal plasma, which is rich in fructose, calcium and certain enzymes. The ampulla is not a gland. It is the wider part of the oviduct (fallopian tube) in the female, where fertilisation takes place.

Option (1) Ampulla — Not a male accessory gland. The ampulla is a part of the female oviduct, between the infundibulum and the isthmus.

Option (2) Seminal vesicles — A male accessory gland. The seminal vesicles are paired glands whose secretion forms part of the seminal plasma.

Option (3) Prostate gland — A male accessory gland. There is one prostate; its secretion also adds to the seminal plasma.

Option (4) Bulbourethral gland — A male accessory gland. The bulbourethral glands are paired; their secretion also helps lubricate the penis.

NCERT Extract:
The Male Reproductive System – “… The male accessory glands (Figure 2.1a, b) include paired seminal vesicles, a prostate and paired bulbourethral glands. Secretions of these glands constitute the seminal plasma which is rich in fructose, calcium and certain enzymes. The secretions of bulbourethral glands also helps in the lubrication of the penis.”
The Female Reproductive System – “… The edges of the infundibulum possess finger-like projections called fimbriae, which help in collection of the ovum after ovulation. The infundibulum leads to a wider part of the oviduct called ampulla.”