Final answer:
The reversal agent for digitoxin or digoxin toxicity is the Digoxin-specific antibody (Digibind), a medication that binds to the toxins for elimination from the body.
Step-by-step explanation:
The reversal agent for toxicity from digitoxin or digoxin is c) Digoxin-specific antibody (Digibind). This antidote works by binding to the digoxin or digitoxin molecules in the body, which are then removed from the bloodstream and excreted. Because digoxin-specific antibodies are specifically designed to target and neutralize the effects of digoxin or digitoxin toxicity, they are the preferred treatment in cases of overdose or when digoxin levels become dangerously high. This is distinct from the treatment for atropine poisoning, which is treated with a muscarinic agonist, not an anticholinergic drug like atropine itself.