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': 'Sperm capacitation takes about : \nSelect and explain. \nA. 2-4 hrs, B. 4-6 hrs, C. 4-6 hrs, D. 8-10 hrs', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 6-8 hrs', 'role': 'assistant'}]