Which gas constitutes LPG (liquefied petroleum gas) that we use as fuel in our homes.

Options

A. methane
B. butane
C. ethane
D. propane

Explanation

### Step-by-Step Solution:

1. **Understanding LPG**: LPG stands for Liquefied Petroleum Gas. It is a common fuel used in homes for cooking and heating.

2. **Composition of LPG**: LPG is not a single gas but a mixture of hydrocarbon gases. The primary components of LPG are two specific hydrocarbons.

3. **Identifying the Gases**: The two main gases that constitute LPG are:
- **Butane (C4H10)**: A four-carbon alkane.
- **Propane (C3H8)**: A three-carbon alkane.

4. **Conclusion**: Therefore, the gases that constitute LPG are butane and propane.

### Final Answer:
The gases that constitute LPG (Liquefied Petroleum Gas) are **butane and propane**.

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