单选题 The physician has ordered Oxtriphyllin (Choledyl SA) 0.2 g. Available tablets of the medicine are 100 mg. How many tablets should be given?
A. 0.5 tablets.
B. 2.0 tablets.
C. 2.5 tablets.
D. 5.0 tablets.

【正确答案】 B

【答案解析】Convert grams to milligrams. 0.2g=200mg. 200mg/x tablets=100mg/tablet, x= 2 tablets.