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 infeile 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 : \nSelect and explain. \nA. Normospermia, B. Oligospermia, C. Azoospermia, D. Aspermia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oligospermia The Semen Analysis of the patient shows : Sperm count is 15 million/ml. PH = 7.5 Volume = 2 ml Morphology = 60% normal Normal should be at least 20 million/ml i.e. this patient is oligospermic (N = > 7.2) N = at least 2 ml N = 50% Normal Morphology So, all criteria are normal except sperm count (to be specific sperm concentration) which is less than normal and therefore most likely diagnosis is oligospermia.', 'role': 'assistant'}]