Which of the following is a natural polymer?

Options

A. Bakelite
B. Cellulose
C. `PVC`
D. Neoprene

Answer

To determine which of the following is a natural polymer, we need to analyze the options provided: Bakelite, Cellulose, PVC, and Neoprene.

### Step-by-Step Solution:

1. **Understand the Types of Polymers**:
- Polymers can be classified into two categories: synthetic and natural.
- **Synthetic Polymers**: These are man-made and derived from petroleum. Examples include nylon, polyester, and polyethylene.
- **Natural Polymers**: These occur in nature and can be extracted. They are often water-based. Examples include silk, DNA, cellulose, proteins, and natural rubber.

2. **Analyze Each Option**:
- **Bakelite**: This is a synthetic polymer made from a condensation reaction of phenol and formaldehyde. Therefore, it is not a natural polymer.
- **Cellulose**: This is a natural polymer found in the cell walls of plants. It is an organic polysaccharide. Hence, it qualifies as a natural polymer.
- **PVC (Polyvinyl Chloride)**: This is produced by the polymerization of vinyl chloride, making it a synthetic polymer.
- **Neoprene**: This is formed by the free radical polymerization of chloroprene, which also classifies it as a synthetic polymer.

3. **Conclusion**:
- Among the options given, the only natural polymer is **Cellulose**.

Thus, the correct answer is **Option B: Cellulose**.