This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'A selective a1 blockers chemically distinct from prazosin used as an hypeensive agent \nSelect and explain. \nA. Trimazosin, B. Tamsulosin, C. Urapidil, D. Doxazosin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .', 'role': 'assistant'}]