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: Medicine
[{'content': 'All of the following are features of MEN II a, except: \nSelect and explain. \nA. Pituitary tumor, B. Pheochromocytoma, C. Medullary Ca thyroid, D. Neuromas', 'role': 'user'}, {'content': "Answer: A \nExplanation: Diseases associated with Multiple Endocrine Neoplasia (MEN) II a are: ? Medullary thyroid carcinoma ? Pheochromocytoma ? Parathyroid hyperplasia or adenoma Pituitary tumor is not a feature of MEN II syndrome. It is featured only in MEN I. Ref: Harrison's Principle of Internal Medicine, 16th Edition, Pages 2231-2234", 'role': 'assistant'}]