**Core Concept**
Seizures in the context of alcohol withdrawal occur due to the abrupt cessation of alcohol's effects on the brain's GABAergic system, leading to an imbalance between excitatory and inhibitory neurotransmission. Alcohol is a central nervous system depressant that enhances GABA's activity, thereby reducing neuronal excitability.

**Why the Correct Answer is Right**
The correct answer corresponds to the time frame when the risk of seizures in alcohol withdrawal is highest. This is because, after 48 hours of abstinence, the body's GABA levels have decreased significantly, and the excitatory neurotransmitters, such as glutamate, have increased. This imbalance causes an overexcitation of neurons, leading to seizures. The peak risk for seizures occurs between 48-72 hours after the last drink.

**Why Each Wrong Option is Incorrect**
**Option A:** Seizures can occur as early as 6-12 hours after the last drink, but the risk is not highest at this time frame.

**Option B:** Seizures in alcohol withdrawal are not typically associated with the first 24 hours of abstinence.

**Option C:** While seizures can occur later than 72 hours, the peak risk is between 48-72 hours.

**Clinical Pearl / High-Yield Fact**
The risk of seizures in alcohol withdrawal can be reduced with benzodiazepines, which enhance GABA's activity and help restore the balance between excitatory and inhibitory neurotransmission.

**Correct Answer: B. 24 hours**