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': "Which of the following is not included in Sipple's syndrome- \nSelect and explain. \nA. Pheochromocytoma, B. Medullary carcinoma thyroid, C. Hyperthyroidism, D. Hyperparathyroidism", 'role': 'user'}, {'content': "Answer: C \nExplanation: MEN type IIA syndrome is known as Sipple's syndrome. It includes →\u200b Medullary Ca thyroid, Pheochromocytoma, Parathyroid adenoma", 'role': 'assistant'}]