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: Unknown
[{'content': 'III perineal tear is involvement of - \nSelect and explain. \nA. Vaginal mucosa, B. Urethral mucosa, C. Levator animuscle, D. Anal Sphincter', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans: D', 'role': 'assistant'}]