Terylene is obtained by the condensation of

Options

A. urea and formaldehyde
B. acrylic acid and hexamethylenediamine
C. ethyleneglycol and phthalic acid
D. malonic acid and hexamethylenediamine

Explanation

To determine what Terylene is obtained from, we need to analyze the options given and identify the correct monomers involved in its synthesis.

### Step-by-Step Solution:

1. **Identify the Monomers**: Terylene is a type of polyester. The primary monomers used in the production of Terylene are ethylene glycol and terephthalic acid.

2. **Chemical Structures**:
- **Ethylene Glycol**: The chemical formula for ethylene glycol is \( \text{C}_2\text{H}_6\text{O}_2 \) or \( \text{HO-CH}_2-\text{CH}_2-\text{OH} \). It consists of two hydroxyl groups (-OH) attached to a two-carbon chain.
- **Terephthalic Acid**: The chemical formula for terephthalic acid is \( \text{C}_8\text{H}_6\text{O}_4 \). It has a benzene ring with two carboxylic acid groups (-COOH) at the 1,4-positions.

3. **Condensation Reaction**: Terylene is formed through a condensation reaction between ethylene glycol and terephthalic acid. During this reaction, water molecules are eliminated, and ester linkages are formed.

4. **Reaction Conditions**: The reaction typically occurs at elevated temperatures, specifically between 240 to 460 Kelvin, to facilitate the condensation process.

5. **Polymer Structure**: The resulting polymer, Terylene, has repeating units derived from the combination of ethylene glycol and terephthalic acid. The structure can be represented as:
\[ -\text{O-CH}_2-\text{CH}_2-\text{O-C(=O)-C}_6\text{H}_4\text{(COOH)}- \]
This indicates the presence of ester linkages and the aromatic character from the terephthalic acid.

6. **Final Answer**: Therefore, Terylene is obtained by the condensation of **ethylene glycol and terephthalic acid**.

### Conclusion:
The correct answer is **C. Ethylene glycol and terephthalic acid**.