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': 'The erectile disorder in males is more specifically treated with which of the following agents ? \nSelect and explain. \nA. Sildenafil, B. Diazepam, C. Fluoxetine, D. Zolpidem', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Sildenafil o Sildenafil, vardenafil and tadalafil are phosphodiesterase V inhibitors indicated for erectile dysfunction.", 'role': 'assistant'}]