## Core Concept
Shohl's solution is a type of **antacid** used to neutralize stomach acid. It is commonly used in the management of **gastroesophageal reflux disease (GERD)**, peptic ulcers, and other conditions associated with excessive stomach acid.

## Why the Correct Answer is Right
Shohl's solution is a **liquid antacid** that contains **sodium citrate** and **citric acid**. The citrate ion helps to neutralize stomach acid by reacting with hydrogen ions to form water and carbon dioxide. This helps to increase the **pH of the stomach** and reduce symptoms of acid reflux and heartburn.

## Why Each Wrong Option is Incorrect
* **Option A:** Incorrect because it does not accurately describe Shohl's solution.
* **Option B:** Incorrect because it is not the correct composition of Shohl's solution.
* **Option D:** Incorrect because it is not the correct answer.

## Clinical Pearl / High-Yield Fact
A key point to remember is that Shohl's solution is often used in **emergency situations** to quickly neutralize stomach acid, such as in cases of **severe heartburn** or **acid reflux**. It is also sometimes used as a **buffering agent** to help manage **metabolic acidosis**.

## Correct Answer Line
**Correct Answer: C. Sodium citrate.**