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': 'Which of the following is not true about Carvedilol? \nSelect and explain. \nA. b1 + b2 + a1 adrenergic receptor blocker, B. Oral bioavailability is almost 80%, C. Has antioxidant propey, D. Cardioprotective in CHF', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oral bioavailability of carvedilol is 30%. It is primarily metabolized and has a t1/2 of 2-8 hrs.', 'role': 'assistant'}]