This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'The major contribution to the semen from: \nSelect and explain. \nA. Testes, B. Seminal vesicles, C. Prostate, D. Bulbourethral and urethral glands', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Semen which is ejaculated during male sexual act is composed of fluid and sperm.\n\nvasdeferens-10%\nseminal vesicles-60%-mucoid consistency\nprostate gland-30%-milky\nso the bulk of semen is seminal vesicle fluid', 'role': 'assistant'}]