When Discussing Antibiotic Treatment (Penicillin G, 500 Mg, PO, Tid)

When discussing antibiotic treatment (penicillin G, 500 mg, PO, tid) with a patient, which of the following is true?
I. There are no interactions to be concerned about with penicillin G.
II. If a patient is on oral contraceptives, it is strongly suggested that a backup means of contraception is used.
III. If a patient is on oral contraceptives, it is strongly suggested that they stop using the contraceptives immediately.
IV. Taking oral contraceptives along with penicillin is fine as long as you double up on the oral contraceptive.

A) I only
B) II only
C) III only
D) IV only