The correct option is B Prostate gland
Prostate gland
The accessory genital gland found only in males is the prostate gland which surrounds the proximal portion of urethra. It produces a slightly acidic milky secretion which nourishes the spermatozoa and aids in their motility..
Bartholin's gland
Bartholin’s gland or greater vestibular gland is located on either side of the vaginal orifice, which secretes a viscid fluid that lubricates the vagina.
Cowper's gland
Bulbourethral glands or Cowper’s glands are paired glands located on either side of the proximal portion of urethra in males. They secrete mucus which help in the lubrication of the penis. They are homologous to Bartholin’s gland in females.
Perineal gland
Perineal glands are a pair of glands situated near the anus in some mammals which secretes substances with particular odour.
Final answer (D) Prostate gland