This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Complications of anaesthesia, Subject name: Anaesthesia
[{'content': 'Drug of choice in cardiogenic shock is \nSelect and explain. \nA. Dopamine, B. Phenylalanine, C. Noradrenaline, D. Adrenaline', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dopamine or dobutamine are positive inotropic drugs with the prompt onset and sho duration of action; they are most useful in patients with failure complicated by severe hypotension.Katzung 13e pg: 220', 'role': 'assistant'}]