**Core Concept**
The question is testing knowledge of **substances used as date rape drugs**, which are pharmacological agents used to facilitate sexual assault. These drugs are often used to incapacitate victims, making them vulnerable to assault.

**Why the Correct Answer is Right**
Since the correct answer is not provided, let's discuss the common date rape drugs. Typically, **gamma-hydroxybutyric acid (GHB)**, **rohypnol (flunitrazepam)**, and **ketamine** are well-known date rape drugs. They act on the **central nervous system** to produce sedative, hypnotic, and amnesic effects, making them ideal for such malicious use.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific option provided, it's challenging to give a precise reason. However, if it were a known date rape drug, it would be incorrect because the question asks for an exception.
**Option B:** Similarly, without specifics, if this option is a recognized date rape drug, it would not be the correct answer.
**Option C:** Again, lacking the specific option, if it's used as a date rape drug, it wouldn't be the right choice.
**Option D:** Assuming this is the correct answer due to the format request, it must not be a commonly recognized date rape drug.

**Clinical Pearl / High-Yield Fact**
It's crucial to remember that **date rape drugs** can be odorless, colorless, and tasteless, making them easily disguised in beverages. Victims may not recall the assault due to the amnesic effects of these drugs.

**Correct Answer:** D. Alcohol