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': 'Compared to the other antidepressant drugs mirtazapine has the distinct ability to act as an antagonist of : \nSelect and explain. \nA. Beta receptors, B. D2 receptors, C. Alpha 2 receptors, D. 5-HT receptors', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]