Which of the following is a synthetic drug?

Options

A. LSD
B. Opium
C. Cocaine
D. Pethidine

Answer

To determine which of the given options is a synthetic drug, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Option 1: LSD
- Option 2: Opium
- Option 3: Cocaine
- Option 4: Pethidine

2. **Analyze Option 1: LSD**:
- LSD stands for lysergic acid diethylamide.
- It is derived from the ergot fungus found on certain plants.
- Since it is obtained from a natural source, LSD is not a synthetic drug.

**Hint**: Look for the source of the drug; if it comes from a natural source, it is not synthetic.

3. **Analyze Option 2: Opium**:
- Opium is obtained from the dried latex of the unripe fruit of the poppy plant.
- As it is derived from a plant, opium is also not a synthetic drug.

**Hint**: Consider whether the drug is extracted from a plant or animal; if so, it is likely not synthetic.

4. **Analyze Option 3: Cocaine**:
- Cocaine is a natural alkaloid obtained from the leaves of the coca plant.
- Since it is derived from a natural source, cocaine is not a synthetic drug.

**Hint**: Check if the drug is a natural compound; if it is, it cannot be classified as synthetic.

5. **Analyze Option 4: Pethidine**:
- Pethidine is a synthetic opioid analgesic.
- It is chemically manufactured and does not occur naturally.
- Pethidine has similar effects to morphine but is not chemically related.

**Hint**: Synthetic drugs are usually man-made; if the drug is chemically synthesized, it is synthetic.

6. **Conclusion**:
- After analyzing all options, the only synthetic drug among the choices is **Option 4: Pethidine**.

### Final Answer:
The synthetic drug among the options is **Pethidine**.