This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: A.N.S., Subject name: Pharmacology
[{'content': 'Action of adranaline is reversed by prazosine but not by propranol \nSelect and explain. \nA. Tachycardia, B. Bronchial dilatation, C. Urinary symptoms of BHP, D. Migraine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: i.e. (Urinary symptoms of BHP): (133-KDT 6th)* Prazocine is a1 blocker and propranol is non selective beta blocker* Urinary symptoms in BHP are solely due to alpha receptorsThe a blockers have no effect on adrenergically induced cardiac stimulation, bronchial dilatation, vasodilation and most of the metabolic changes because these are mediated predominantly through b-receptors (133-KDT 6th)', 'role': 'assistant'}]