The type of medicine used to treat indigestion is a/an __________.
The correct option is C antacid
During indigestion hydrochloric acid is produced in excess which causes acidity. Antacids are a class of medicines that neutralize acid in the stomach. They contain ingredients such as aluminum, calcium, magnesium, or sodium bicarbonate which act as bases (alkalis) to counteract stomach acid and make its pH more neutral.