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
Which of the following drugs, if given with terfenadine, can cause ventricular arrhythmias ? 
Select and explain. 
A. Ketoconazole, B. Griseofulvin, C. Ampicillin, D. Sparfloxacin
A: Ketoconazole
Answer: A: Ketoconazole 
Explanation: None