This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Which is an endogenous catecholamine 
Select and explain. 
A. Dopamine, B. Dobutamine, C. Adrenaline, D. Nor adrenaline
B: Dobutamine
Answer: B: Dobutamine 
Explanation: Refer kK sharma 2007/172 Dopamine, adrenaline and nor adrenaline are endogenous catrcholamine Adrenaline, dipevefrine, Dobutamine ,ibopamine,dopexamine and Fenoldopam are the exogenous (synthetic) catrcholamine