Which of the following compounds are administered as antacids?
(i) Sodium carbonate
(ii) Sodium hydrogen carbonate
(iii) Aluminium carbonate
(iv) Magnesium hydroxide
Antacids are used to control the excess release of HCl in the stomach that causes acidity and hyperacidity. From the given options, (ii) Sodium hydrogen carbonate and (iv) Magnesium hydroxide are types of antacids.