Read the passage and answer the question.
A group of youth were having a 'rave party' in an isolated area and was raided by police. Packets of 'smack' and syringes with needles were found littered around.
Which of the following drug is commonly known as Smack?

Options

A. Heroin
B. Morphine
C. Codeine
D. Pethidine

Explanation

To answer the question regarding which drug is commonly known as "smack," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Context**: The passage describes a situation where packets of "smack" and syringes were found at a rave party. This indicates that "smack" is a type of drug.

2. **Recognize Common Drug Slang**: In drug culture, many substances have slang names. One of the most well-known drugs that is referred to as "smack" is heroin.

3. **Define Heroin**: Heroin is a semi-synthetic opioid derived from morphine. It is often found in a white crystalline powder form and is known for its high potential for addiction and abuse.

4. **Chemical Name**: The chemical name for heroin is diacetylmorphine, which is produced through the acetylation of morphine.

5. **Conclusion**: Based on the information provided, the drug commonly known as "smack" is heroin.

### Final Answer:
The drug commonly known as "smack" is **heroin**.

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