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': 'All are clinical features of pheochromocytoma, except- \nSelect and explain. \nA. Increased hematocrit, B. Ohostatic hypotension, C. Low Coisol level, D. Impaired glucose tolerance', 'role': 'user'}, {'content': 'Answer: C \nExplanation: coisol level is increased ( Harrison 17 pg 2271)', 'role': 'assistant'}]