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
All are clinical features of pheochromocytoma, except- 
Select and explain. 
A. Increased hematocrit, B. Ohostatic hypotension, C. Low Coisol level, D. Impaired glucose tolerance
C: Low Coisol level
Answer: C: Low Coisol level 
Explanation: coisol level is increased ( Harrison 17 pg 2271)