## Core Concept
Digitalis toxicity occurs due to excessive levels of digitalis glycosides in the body, leading to various cardiac and extracardiac symptoms. The management of digitalis toxicity involves stopping the digitalis glycoside, correcting electrolyte imbalances, and using specific antidotes.

## Why the Correct Answer is Right
The correct answer, , is used in the treatment of digitalis toxicity. Digitalis toxicity can lead to hyperkalemia, and administering and can help manage this. is specifically used as an antidote for digitalis toxicity.

## Why Each Wrong Option is Incorrect
* **Option A:** - This option is incorrect because, although can be used to manage certain symptoms of digitalis toxicity, is not typically used as a treatment for digitalis toxicity.
* **Option B:** - This is incorrect because can be used in the management of digitalis toxicity, particularly for symptomatic bradycardia.
* **Option C:** - This option is incorrect because is indeed used in the treatment of digitalis toxicity.

## Clinical Pearl / High-Yield Fact
A key clinical pearl is that (potassium) can be used cautiously in digitalis toxicity if the patient is hyperkalemic, but it should be given with caution and ideally after administering to stabilize the cardiac membranes.

## Correct Answer: .