The antacid is basic and will neutralize the acid entering the esophagus. Thus, the correct option is B.
In order to treat indigestion and heartburn, antacids work to balance out (neutralize) the acid in stomach.
Anti-acid medications help to balance the stomach's acid. Magnesium carbonate, magnesium trisilicate, and aluminum hydroxide are examples of antacids. These come in pill and liquid form.
A medication called simethicone is added to some antacids to assist minimize flatulence.
To further assist in defending the lining of the gullet (esophagus) against stomach acid, a further class of medications known as alginates is administered. Alginates include alginic acid and sodium alginate.
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