This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Action of 1-2mcg/kg.min of dopamine is 
Select and explain. 
A. Renal vasodilatation, B. Increased blood pressure, C. Inotropic action, D. Vasoconstriction
A: Renal vasodilatation
Answer: A: Renal vasodilatation 
Explanation: Dopamine at dose 1-2mcg/kg.min- renal vasodilatation2-10mcg/kg/min : beta 1 stimulationMore than 10 mcg/kg/min - vasoconstriction - alpha stimulationRef: Harrison; 17th ed. Pg 1453