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': 'Asthenozoospermia is \nSelect and explain. \nA. Increased abnormal forms of sperm, B. Decreased sperm motility, C. Absence of sperms in semen, D. Increased white cells in semen', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Asthenozoospermia is decreased sperm motility.', 'role': 'assistant'}]