Ram was suggested to take antibiotics when he previously had an infection. Remembering this, everytime he had an infection, he directly started taking antibiotics. Eventually when he consulted the doctor, he was advised against regular use of antibiotics. What could the reason(s) be for him being advised?

The correct options are
A Antibiotics may end up destroying useful bacteria.
B Harmful bacteria may develop resistance to the medicine.
D Antibiotics cause reduction of quantity of certain vitamins in our body.
An antibiotic is a type of medicine that primarily works against bacteria. Antibiotic medications are widely used in the treatment and prevention of bacterial infections. They either kill or inhibit the growth of bacteria. Although very useful, when repeatedly used, the bacteria starts to resist the effects of antibiotics. Also, the antibiotics doesn't differentiate between useful and harmful bacteria, so they may end up killing useful bacteria. They are also known to reduce the quantity of some vitamins in the body.