A condensation polymer among the following polymer is

Options

A. Teflon
B. Polystyrene
C. PVC
D. Dacron

Answer

To determine which of the given polymers is a condensation polymer, we need to analyze the options provided: Teflon, polystyrene, PVC, and Dacron.

### Step-by-Step Solution:

1. **Understanding Condensation Polymers**:
- Condensation polymers are formed through a step-growth polymerization process where two different monomer units react to form a larger polymer, releasing a small molecule (like water, ammonia, or HCl) as a byproduct.

2. **Analyzing the Options**:
- **Teflon**: This is made from tetrafluoroethylene and is an addition polymer. It does not involve the elimination of small molecules during its formation.
- **Polystyrene**: This is made from styrene and is also an addition polymer. Similar to Teflon, it does not involve the elimination of small molecules.
- **PVC (Polyvinyl Chloride)**: This polymer is made from vinyl chloride and is again an addition polymer. It does not involve the elimination of small molecules.
- **Dacron**: This is a condensation polymer made from the reaction of ethylene glycol and terephthalic acid. During its formation, water is eliminated as a byproduct.

3. **Conclusion**:
- Among the given options, Dacron is the only condensation polymer.

### Final Answer:
The condensation polymer among the following is **Dacron**.