**Core Concept**
Alcohol withdrawal is a complex clinical syndrome that occurs when an individual suddenly stops or reduces their alcohol consumption after a period of heavy drinking. The symptoms can range from mild to severe and are caused by the abrupt cessation of the depressant effects of alcohol on the central nervous system.

**Why the Correct Answer is Right**
The most recognized symptom of alcohol withdrawal is **tremors**. This is because alcohol withdrawal leads to an imbalance of neurotransmitters in the brain, particularly gamma-aminobutyric acid (GABA), which is an inhibitory neurotransmitter. As the body adapts to the absence of alcohol, GABA levels decrease, causing an increase in excitatory neurotransmitters like glutamate. This imbalance leads to symptoms like tremors, anxiety, and seizures. The severity of tremors can range from mild to severe and is often the first symptom to appear.

**Why Each Wrong Option is Incorrect**
**Option A:** Hallucinations are a severe symptom of alcohol withdrawal, but they are not the most recognized symptom. Hallucinations occur in more severe cases of withdrawal, often in the form of auditory or visual hallucinations.
**Option B:** Delirium tremens (DTs) is a severe complication of alcohol withdrawal that involves a combination of symptoms like confusion, agitation, and hallucinations. While DTs are a serious condition, they are not the most recognized symptom of alcohol withdrawal.
**Option C:** Anxiety is a common symptom of alcohol withdrawal, but it is not the most recognized symptom. Anxiety can range from mild to severe and is often accompanied by other symptoms like tremors and insomnia.

**Clinical Pearl / High-Yield Fact**
A classic mnemonic to remember the symptoms of alcohol withdrawal is **F.I.T.S.**:
* **F** - **F**ever
* **I** - **I**nsonnia
* **T** - **T**remors
* **S** - **S**eizures
This mnemonic can help you remember the most common symptoms of alcohol withdrawal.

**Correct Answer:** C. Tremors.