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': 'All are involved in MEN type II A except \nSelect and explain. \nA. Parathyroid, B. Adrenal, C. Thyroid, D. Pituitary', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]