Which of the following salts is an active ingredient in antacids?ANa2CO3BCaOCl2CCaCl2DNaHCO3Answer: D. NaHCO3 Read Explanation: The active ingredient in antacids is sodium bicarbonate (NaHCO3), also known as baking soda.It is used to neutralize excess stomach acid, providing relief from heartburn, indigestion, and upset stomach. Sodium bicarbonate is a white, crystalline, alkaline solid with a slightly salty taste. Read more in App