A patient with alcohol dependence is prescribed a treatment that works by aversion therapy. Which drug is being used?

Correct option is A

Aversion therapy in alcohol dependence = disulfiram, which induces unpleasant effects if alcohol is consumed, deterring relapse.
Explanation of options: (a) ✔ Correct; disulfiram = aversion therapy. (b) ✘ Naltrexone reduces craving by blocking opioid receptors, not aversion. (c) ✘ Acamprosate modulates glutamate, reduces relapse, not aversion. (d) ✘ Diazepam is used for withdrawal symptoms, not maintenance therapy.