I'm not 100% certain because i know that doctors give folic acid to both a and b. However, I'm going to say C because the folic acid is putting a liner on your stomach so that when you do get pregnant there will be protection from certain medications. I hope this is the right answer for you.
The correct answer would be 50
Monitor and supervise cardiovascular reactions.
Observe general movements to avoid falling accidents.
Monitor any other adverse reaction and effects of the drug.
Monitor for hypersensitivity.