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': 'Which is a not an essential criteria according to WHO for normal semen analysis : \nSelect and explain. \nA. Sperm count > 20 million / ml, B. Volume > 1 ml, C. Sperm with normal morphology (strict criteria) > 15%, D. Motility > 25% with rapidly progressive motilityTubal pathology', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Volume > 1 ml', 'role': 'assistant'}]