This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infertility, Subject name: Gynaecology & Obstetrics
Major contribution to the semen is from: 
Select and explain. 
A. Testes, B. Seminal vesicles, C. Prostate, D. Bulbourethral and urethral glands
B: Seminal vesicles
Answer: B: Seminal vesicles 
Explanation: Semen which is ejaculated during male sexual act is composed of fluid and sperm. vasdeferens-10% seminal vesicles-60%-mucoid consistency prostate gland-30%-milky so the bulk of semen is from seminal vesicles. TEXTBOOK OF MEDICAL PHYSIOLOGY ,GUYTON,Pg no:888,8th edition