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': 'A 25 year old infertile male underwent semen analysis. Results show: sperm count - 15 million/ ml; pH - 7.5; volume - 2 ml; no agglutination is seen. Morphology shows 60% normal and 60% motile sperms. Most likely diagnosis is:a) Normospermiab) Oligospermiac) Azoospermiad) Aspermia \nSelect and explain. \nA. ac, B. ab, C. ad, D. bc', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The semen analysis of the patient shows:', 'role': 'assistant'}]