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
Pheochromocytoma predominantly secretes - 
Select and explain. 
A. Epinephrine, B. Norepinephrine, C. Dopamine, D. DOPA
A: Epinephrine
Answer: A: Epinephrine 
Explanation: epinephrine is produced in much more amount that rest of the hormones ( Harrison 17 pg 2271)