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
Motile spermatozoa found in wet mount of vaginal secretions indicates of intercourse within the past: 
Select and explain. 
A. 3 hours, B. 12 hours, C. 24 hours, D. 48 hours
B: 12 hours
Answer: B: 12 hours 
Explanation: 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.