Final answer:
The ammonia reversal agent for toxicity is Ammonium hydroxide (d). It helps to reduce the concentration of ammonia in the body, preventing further harm.
Step-by-step explanation:
The ammonia reversal agent for toxicity is Ammonium hydroxide (d). Ammonium hydroxide is a solution of ammonia in water and is used to neutralize the toxic effects of ammonia poisoning. It helps to reduce the concentration of ammonia in the body, preventing further harm.