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
[{'content': 'Absence of fructose in the semen suggests: \nSelect and explain. \nA. Congenital absence of seminal vesicle, B. Paial duct obstruction, C. None, D. Both', 'role': 'user'}, {'content': "Answer: D \nExplanation: Absence of fructose suggests congenital absence of seminal vesicle or paial obstructio of the ductal system or both. D.C.DUTTA'S TEXTBOOK OF GYNECOLOGY,Pg no:250,6th edition", 'role': 'assistant'}]