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: Surgery
[{'content': 'Medulloblastoma associated Turcot syndrome is characterized by mutation in : \nSelect and explain. \nA. KRAS, B. P53, C. APL, D. PTEN', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]