The fluid part of semen is contributed by

i. Seminal vesicle

ii. Prostate

iii. Urethra

iv. Bulbourethral gland

The correct option is B

I, II and IV

The male accessory glands include paired seminal vesicles, a prostate and paired bulbourethral glands. Secretions of these glands constitute the fluid of semen which is rich in fructose, calcium and certain enzymes. The secretions of bulbourethral glands also help in the lubrication of the penis. The urethra is the duct that extends through the penis in male reproductive system and serves a common passage for both sperm and urine. In females, urethra has no reproductive function.