**Core Concept**
Delirium tremens (DTs) is a severe and potentially life-threatening complication of alcohol withdrawal, characterized by altered mental status, tremors, and hallucinations. It occurs when the body is unable to adapt to the sudden absence of alcohol, leading to an imbalance of neurotransmitters such as GABA and glutamate.

**Why the Correct Answer is Right**
Benzodiazepines, specifically lorazepam, are the treatment of choice for delirium tremens. They work by enhancing the activity of GABA, a neurotransmitter that has a calming effect on the brain, thereby reducing the symptoms of DTs. Lorazepam is preferred over other benzodiazepines due to its long half-life, which allows for easier titration and less risk of withdrawal.

**Why Each Wrong Option is Incorrect**
**Option A:** Chlorpromazine is an antipsychotic medication that may be used to manage hallucinations, but it is not the first-line treatment for delirium tremens and may even exacerbate the condition.
**Option B:** Haloperidol is an antipsychotic medication that can be used to manage agitation and hallucinations, but it is not the treatment of choice for delirium tremens and may increase the risk of neuroleptic malignant syndrome.
**Option C:** Phenytoin is an antiepileptic medication that may be used to manage seizures, but it is not indicated for the treatment of delirium tremens.

**Clinical Pearl / High-Yield Fact**
The "rum fit" is a colloquial term for seizures that occur during alcohol withdrawal, often in the absence of a clear history of seizure disorder. Benzodiazepines, such as lorazepam, are effective in preventing and treating seizures during alcohol withdrawal.

**Correct Answer: C. Lorazepam**