Which of the following is the correct interpretation of a prescription that reads Penicillin V 500 mg po qid #50?

a. This is not a valid order because there is no time.
b. Take one tablet of penicillin three times a day for 16 days.
c. Dispense 50 tablets of penicillin 500 mg each and have the patient take one tablet four times a day.
d. Dispense 500 tablets of penicillin and have the patient take one tablet four times a day.