This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Pharmacology, Subject name: Pharmacology
[{'content': 'All of the following drugs act on ionic channels except: \nSelect and explain. \nA. Nicotine, B. Insulin, C. Glibenclamide, D. Diazepam', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Insulina. insulin acts on enzymatic (tyrosine kinase) receptorsb. Nicotine acts on NM and NN receptors which are ion channel receptorsc. Diazepam acts on GABA-BZD-Cl channel complex that mediates entry of chlorided. Glibenclamide is a sulfonylurea that acts on ACh sensitive K+ channels.', 'role': 'assistant'}]