This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endometriosis and Infertility, Subject name: Gynaecology & Obstetrics
[{'content': 'The major contribution to the human seminal fluid is from: \nSelect and explain. \nA. Testes, B. Seminal vesicles, C. Prostate, D. Bulbourethral and urethral glands', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is b, i.e. Seminal vesiclesMajor contribution to semen is by seminal vesicle, followed by prostatic fluid followed by secretion of bulbourethral glands.', 'role': 'assistant'}]