Natural polymer among the following is

Options

A. Cellulose
B. PVC
C. Teflon
D. Polyethylene

Answer

To determine which of the given options is a natural polymer, we need to analyze each option based on their origin and structure.

### Step-by-Step Solution:

1. **Understanding Natural Polymers**:
- Natural polymers are large molecules made up of repeating units (monomers) that are found in nature, typically in plants and animals. They are not synthesized artificially.

2. **Analyzing the Options**:
- **Option A: Cellulose**
- Cellulose is a polysaccharide that is found in the cell walls of plants. It is composed of glucose monomers linked together. Since it is derived from natural sources (plants), cellulose is classified as a natural polymer.

- **Option B: PVC (Polyvinyl Chloride)**
- PVC is a synthetic polymer made from the polymerization of vinyl chloride monomers. It is not found in nature and is produced through chemical processes in laboratories. Therefore, it is not a natural polymer.

- **Option C: Teflon**
- Teflon, or polytetrafluoroethylene (PTFE), is another synthetic polymer that is produced from the polymerization of tetrafluoroethylene. It is manufactured in laboratories and is not a natural polymer.

- **Option D: Polyethylene**
- Polyethylene is a widely used synthetic polymer made from the polymerization of ethylene monomers. Like PVC and Teflon, it is produced artificially and is not found in nature.

3. **Conclusion**:
- Among the options provided, only cellulose is a natural polymer. The other options (PVC, Teflon, and Polyethylene) are synthetic polymers.

### Final Answer:
The natural polymer among the following is **Cellulose**.