Which of the following drug's may inhibit the m etabolism of ziprasidone.. Ketoconazole

Which of the following drug's may inhibit the m etabolism of ziprasidone?
I. Erythromycin
II. Ketoconazole
III. Phenobarbital.

A. I only
B. II only
C. I and II only
D. II and III only
E. I, II and III