This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexual offences and infanticide, Subject name: Forensic Medicine
After sexual intercourse, the intact hymen usually ruptures 
Select and explain. 
A. Anteriorly, B. In the midline posteriorly, C. On one side only, D. On both sides
B: In the midline posteriorly
Answer: B: In the midline posteriorly 
Explanation: The hymen is a fold of mucous membrane, about 1 mm thick, situated at the vaginal outlet. In a prepubeal victim, vaginal penetration usually results in tearing of the hymen in the posterior 180deg, i.e. Between 3 and 9 o'clock position. Ref - Krishan Vij textbook of forensic medicine and toxicology 5e pg : 315