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 of the following drugs, if given with terfenadine, can cause ventricular arrhythmias ? \nSelect and explain. \nA. Ketoconazole, B. Griseofulvin, C. Ampicillin, D. Sparfloxacin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]