Which one of the following structures is not the male sex accessory d…

The correct answer is Option (4) → Seminal vesicles

The male reproductive system has accessory ducts and accessory glands. The ducts carry the sperms out of the testis: rete testis, vasa efferentia, epididymis and vas deferens. The glands add fluid to the semen: the seminal vesicles, the prostate and the bulbourethral glands.

(1) Rete testis — A male sex accessory duct. The seminiferous tubules open into the rete testis.

(2) Vas deferens — A male sex accessory duct. It carries sperms from the epididymis towards the urethra.

(3) Vasa efferentia — A male sex accessory duct. These fine ducts carry sperms from the rete testis to the epididymis.

(4) Seminal vesicles — Not a male sex accessory duct. The seminal vesicles are accessory glands. Their secretion forms part of the seminal plasma.

Note: The same question was also asked in CUET (UG) 2025 on 22-05-2025 (Slot 1).

NCERT Extract:
The Male Reproductive System – “… The male sex accessory ducts include rete testis, vasa efferentia, epididymis and vas deferens (Figure 2.1b). The seminiferous tubules of the testis open into the vasa efferentia through rete testis. The vasa efferentia leave the testis and open into epididymis located along the posterior surface of each testis.”
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.”