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': 'Selective a1 - A blocker is - \nSelect and explain. \nA. Prazosin, B. Terazosin, C. Tamsulosin, D. Indoramine', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Tamsulosin", 'role': 'assistant'}]