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': "Dale's vasomotor reversal - \nSelect and explain. \nA. Stimulation of alpha-1 receptors, B. Stimulation of alpha-2 receptors, C. Stimulation of beta-1 receptors, D. Stimulation of beta-2 receptors", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Stimulation of beta-2 receptors", 'role': 'assistant'}]