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': 'Which is not the component of carneys traid \nSelect and explain. \nA. GIST, B. Pulmonary chondromas, C. Osteoma, D. Extra adrenal paraganglioma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]