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
[{'content': 'One of the following is a sure sign of rape : \nSelect and explain. \nA. Ruptured hymen in a girl aged 20 years, B. Presence of semen in the posterior fornix in a girl age 20 years, C. Presence of semen in the posterior fornix in a girl age 14 Years, D. Presence of semen in the posterior fornix in a married girl age 16 years', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Semen in fornix in a girl < 14 years', 'role': 'assistant'}]