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': 'Depression occurs as a side effect due to the use of: \nSelect and explain. \nA. Reserpine, B. Propranolol, C. Morphine, D. Amphetamine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]