Thanks for the query.
Tablets will not prevent cesarean sections.
The mode of delivery depends on factors like:
Maternal condition: type of pelvis, uterine and cervical status etc.
Placental condition: placenta previa
Baby condition: size of the baby, liquor etc.
So now what you can do is, take nutritious diet, maintain adequate nutrition, take regular antenatal checkups, maintain adequate weight, do minimal exercises like walking etc. These can help to some extent in achieving normal vaginal delivery