Among the following polymer, identify compolymer ?

Options

A. Nylon-6
B. Starch
C. PVC
D. Protein

Answer

To identify the copolymer among the given options, we need to understand the definitions of polymers and copolymers.

### Step-by-Step Solution:

1. **Definition of Polymer**:
- A polymer is a large molecule composed of repeating structural units (monomers). These monomers can be the same or different.

2. **Definition of Copolymer**:
- A copolymer is a type of polymer that is made from two or more different types of monomers. This means that in its structure, there are multiple kinds of repeating units.

3. **Analyzing the Given Polymers**:
- **Nylon 6**:
- It is made from caprolactam, which is a single type of monomer. Therefore, it is a homopolymer, not a copolymer.
- **Starch**:
- Starch is composed of glucose units, which are all the same type. Thus, it is also a homopolymer.
- **PVC (Polyvinyl Chloride)**:
- PVC is made from vinyl chloride, which is again a single type of monomer. Hence, it is a homopolymer.
- **Proteins**:
- Proteins are made from amino acids, which can be of various types (e.g., alanine, glycine, lysine, arginine). Since proteins consist of different types of amino acids, they qualify as copolymers.

4. **Conclusion**:
- Among the given options, the only copolymer is **Proteins** because they are made from multiple types of monomers (amino acids).

### Final Answer:
**The copolymer among the given options is Proteins.**