This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'TSG mutated in familial gastric ca \nSelect and explain. \nA. APC, B. CDKN2A, C. E-cadherin, D. PTEN', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]