A copolymer out of the following is

Options

A. PVC
B. Nylon-6,6
C. Teflon
D. Polybutadiene

Explanation

To determine which of the given options is a copolymer, we need to understand the definition of a copolymer and analyze the provided polymers.

### Step-by-Step Solution:

1. **Understanding Copolymers**: A copolymer is a polymer that is made from two different types of monomers. This means that the polymer chain is composed of two different repeating units.

2. **Analyzing the Given Polymers**:
- **PVC (Polyvinyl Chloride)**: This polymer is made from the monomer vinyl chloride (CH2=CHCl). It is formed from a single type of monomer, so it is not a copolymer.
- **Nylon 66**: This polymer is formed from two different monomers: hexamethylene diamine and adipic acid. The reaction between these two monomers involves the elimination of water (a condensation reaction), resulting in the formation of the copolymer nylon 66.
- **Teflon (Polytetrafluoroethylene)**: This polymer is made from the monomer tetrafluoroethylene (CF2=CF2). Like PVC, it is formed from a single type of monomer, so it is not a copolymer.
- **Polybutadiene**: This polymer is made from the monomer butadiene (C4H6). Again, it is formed from a single type of monomer, so it is not a copolymer.

3. **Conclusion**: Among the options provided, only nylon 66 is formed from two different monomers, making it a copolymer.

### Final Answer:
The copolymer from the given options is **Nylon 66**.