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: Pathology
[{'content': 'Point mutaton in which protooncogene is responsible for the development of gastrointestinal stromal tumor \nSelect and explain. \nA. KIT, B. ALK, C. RET, D. FLT3', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., KIT", 'role': 'assistant'}]