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': 'Common side effect of angiotensin receptor blocker? \nSelect and explain. \nA. Postural hypotension, B. Uicaria, C. Bronchospasm, D. Hypokalemia', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Postural hypotension", 'role': 'assistant'}]