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Which of the following statements is correct about sodium hydrogen carbonate?

A) Sodium hydrogen carbonate is a mild, non- corrosive base.

B) When solid sodium hydrogen carbonate is heated, it decomposes to give sodium carbonate, carbon dioxide and water.

C) Sodium hydrogen carbonate is used as an antacid in medicine to remove acidity of the stomach.

D)  All of these

E)  None of these