Which of the following illustrates antacid activity? A)NaCl → Na⁺ + Cl^- B)HCl → H⁺ + Cl^- C)Mg(OH)₂ + HCl → MgCl₂ + H₂O D)KCl → K⁺ + Cl^-

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The reaction in option C shows the neutralization of hydrochloric acid by magnesium hydroxide, producing magnesium chloride and water. This is a typical antacid reaction where the base (Mg(OH)₂) reacts with the acid (HCl) to form a salt (MgCl₂) and water (H₂O), thereby neutralizing the excess stomach acid. Options A, B, and D do not show any antacid activity.

Which of the Following Illustrates Antacid Activity