This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trace evidences, Subject name: Forensic Medicine
[{'content': 'Motile spermatozoa found in wet mount of vaginal secretions indicates of intercourse within the past: \nSelect and explain. \nA. 3 hours, B. 12 hours, C. 24 hours, D. 48 hours', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Motile spermatozoa should be found in vagina for 6-12 hrs they are likely to be found upto 3 days later,and occasionally they are found 7 days later.', 'role': 'assistant'}]