This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Sympathomimietic causing increase in mean blood pressure, hea rate and cardiac output on intravenous infusion is? \nSelect and explain. \nA. Adrenaline, B. Isoprenaline, C. Norepinephrine, D. Phenylephrine', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Adrenaline", 'role': 'assistant'}]