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': 'Proto-oncogene involved in GIST \nSelect and explain. \nA. KIT, B. RAS, C. RET, D. MYC', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]