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
[{'content': 'Action of 1-2mcg/kg.min of dopamine is \nSelect and explain. \nA. Renal vasodilatation, B. Increased blood pressure, C. Inotropic action, D. Vasoconstriction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]