This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Dose of clonidine in suppression test done for pheochromocytoma is? \nSelect and explain. \nA. 0-3 mg, B. 10 mg, C. 100 mg, D. 200 nig', 'role': 'user'}, {'content': 'Answer: A \nExplanation: clonidine suppression test is less sensitive so rarely used( Harrison 17 pg 2271)', 'role': 'assistant'}]