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': 'Which among the following drugs is NOT used orally? \nSelect and explain. \nA. Lignocaine, B. Verapamil, C. Phenytoin, D. Quinidine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]