Which product is the antidote for digitalis toxicity?

The correct answer is D: Digoxin immune fab. Digoxin immune fab is a specific antidote for digitalis toxicity as it binds to digoxin, the active ingredient in digitalis, and helps in its elimination from the body. Gamma globulin (A) is not an antidote for digitalis toxicity. Cardizem (B) is a calcium channel blocker and not used as an antidote for digitalis toxicity. Protamine (C) is used to reverse the effects of heparin, not digitalis toxicity. It is important to choose the correct antidote to ensure effective treatment for digitalis toxicity.