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: Anaesthesia
[{'content': 'All  except one are true about cocaine \nSelect and explain. \nA. Is ester of benzoic acid, B. Produces para aminobenzoic acid as metabolite, C. Metabolised by liver, D. Vasoconstrictor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Cocaine being metabolisd by liver, does not produce PABA.', 'role': 'assistant'}]