## Core Concept
The core concept being tested here is the management of alcohol withdrawal syndrome, which is a condition that occurs when an individual who has been drinking heavily for a prolonged period either significantly reduces their alcohol consumption or stops drinking altogether. The management involves the use of medications to alleviate symptoms and prevent complications.

## Why the Correct Answer is Right
Benzodiazepines are considered the first-line treatment for alcohol withdrawal syndrome. They work by enhancing the effect of the neurotransmitter gamma-aminobutyric acid (GABA) at the GABA_A receptor, which is the primary mechanism through which alcohol exerts its effects. By doing so, benzodiazepines help mitigate the symptoms of alcohol withdrawal, such as anxiety, agitation, and tremors, and can prevent progression to more severe complications like seizures and delirium tremens. **Lorazepam (Ativan)** and **Diazepam (Valium)** are commonly used benzodiazepines for this purpose.

## Why Each Wrong Option is Incorrect
- **Option A:** While barbiturates can be effective in reducing symptoms of alcohol withdrawal, they are not the drug of choice due to their potential for abuse, dependence, and narrower therapeutic index compared to benzodiazepines.
- **Option B:** Although some antipsychotics can be used in certain contexts for managing agitation, they are not the preferred choice for alcohol withdrawal due to potential side effects, such as lowering the seizure threshold, and less efficacy in addressing the spectrum of withdrawal symptoms.
- **Option D:** Beta-blockers can help manage some of the autonomic symptoms of alcohol withdrawal (like tachycardia and hypertension) but do not address the underlying pathophysiology or prevent seizures and delirium tremens.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **benzodiazepines are the mainstay of treatment for alcohol withdrawal** and that they should be tapered gradually after initiation to manage withdrawal symptoms effectively and to prevent rebound symptoms. The choice of benzodiazepine can depend on the patient's liver function, as some are metabolized differently.

## Correct Answer: C. Lorazepam.