The human made synthetic chemical used in refrigerator is

Options

A. LPG
B. CFC
C. `CH_(4)`
D. PVC

Explanation

**Step-by-Step Solution:**

1. **Identify the Options Given**: The question provides four options: LPG, CFC, CH4, and PVC.

2. **Analyze Each Option**:
- **LPG (Liquefied Petroleum Gas)**: This is a mixture of hydrocarbons, primarily butane and propane, used mainly as fuel. It is not used as a refrigerant.
- **CFC (Chlorofluorocarbons)**: This is a group of synthetic chemicals that are commonly used as refrigerants in refrigerators and air conditioning systems. This is a strong candidate.
- **CH4 (Methane)**: This is a simple hydrocarbon and a greenhouse gas. It is not used in refrigeration.
- **PVC (Polyvinyl Chloride)**: This is a synthetic plastic polymer used in various applications but not as a refrigerant.

3. **Determine the Correct Answer**: Among the options analyzed, CFC (Chlorofluorocarbons) is the only synthetic chemical specifically used in refrigerators.

4. **Conclude the Answer**: Therefore, the human-made synthetic chemical used in refrigerators is **CFC**.

**Final Answer**: CFC (Chlorofluorocarbons)

---