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: Psychiatry
[{'content': 'The erectile disorder in males is more specifically treated with which of the following agent ? \nSelect and explain. \nA. Sildenafil, B. Diazepam, C. Fluxetine, D. Zolpidem', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]