None of the choices is correct but if the question is asking for a 30-day supply instead of 3 the answer would be letter B or 40 tablets. In the medical industry, they use medical abbreviations (Latin origin) when giving medical prescriptions.
The abbreviation q.i.d. means quater in die or 4 times a day, t.i.d. means ter in die or 3 times a day, b.i.d. is bis in die or twice daily, and q.d. is quaque die or daily. Using the abbreviation, 4 tablets are needed on the 1st day, 3 on 2nd, 10 for the 5 days, and 23 for the days thereafter for a total of 40 tablets.