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': 'Investigation of choice in case of a pt. with episodic hypertension, headache and thyroid nodule - \nSelect and explain. \nA. Urinary HIAA, B. Urinary catecholomine and aspiration of nodule, C. Thyroid function test only, D. Urinary basic amino acid metabolite', 'role': 'user'}, {'content': 'Answer: B \nExplanation: This pt is having MEN type II syndrome which is characterized by\nPheochromocytoma and\nMedullary carcinoma of thyroid (MCT)\nUrinary catecholamines are increased in pheochromocytoma\nAspiration of nodule will show amyloid material (seen in MCT)', 'role': 'assistant'}]