This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Nitroglycerine is effective when adminsted sublingually because it is \nSelect and explain. \nA. non ionized and lipid soluble, B. ionized and lipid soluble, C. non ionized and water insoluble, D. ionized and water soluble', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nitroglycerin is effective when retained sublingually because it is non ionized and has very high lipid solubility.Thus,the drug is absorbed very rapidly. (Ref-Goodman Gillman12th/e p124,125)', 'role': 'assistant'}]