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: Forensic Medicine
Motile spermatozoa found in wet mount of vaginal secretions are indicative of intercourse within the past:Karnataka 09; LIP 09; MAHE 11 
Select and explain. 
A. 6 h, B. 12 h, C. 24 h, D. 48 h
B: 12 h
Answer: B: 12 h 
Explanation: Ans. 12 h