Drugs requiring refrigeration shall be stored in a refrigerator containing a thermometer and capable of maintaining a temperature range _______ degrees Fto _______ degrees F.
a. 32 degrees F. to 40 degrees F.
b. 35 degrees F. to 45 degrees F.
c. 38 degrees F. to 48 degrees F.
d. 40 degrees F. to 50 degrees F.