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

Ampulla.

The correct answer is option (1) -Ampulla.

 Ampulla is not a male accessory gland.

The male accessory glands are the seminal vesicles, prostate gland, and bulbourethral glands. These glands contribute various components to semen, playing a crucial role in the nourishment, protection, and transport of sperm. Secretions of these glands constitute the seminal plasma which is rich in fructose, calcium and certain enzymes. The secretions of bulbourethral glands also help in the lubrication of the penis.

The ampulla, on the other hand, is a part of the female reproductive system.