The two monomers for the synthesis of Nylon `6,6` are :

Options

A. `HOOC(CH_(2))_(4)COOH, H_(2)N(CH_(2))_(4)NH_(2)`
B. `HOOC(CH_(2))_(6)COOH, H_(2)N(CH_(2))_(4)NH_(2)`
C. `HOOC(CH_(2))_(4)COOH, H_(2)N(CH_(2))_(6)NH_(2)`
D. `HOOC(CH_(2))_(6)COOH, H_(2)N(CH_(2))_(6)NH_(2)`

Explanation

To determine the two monomers used in the synthesis of Nylon 6,6, we need to identify the specific compounds involved in its formation.

### Step-by-Step Solution:

1. **Identify the Monomers**: Nylon 6,6 is synthesized from two specific monomers: adipic acid and hexamethylenediamine.

2. **Structure of Adipic Acid**: Adipic acid is a dicarboxylic acid with the formula HOOC-(CH2)4-COOH. This means it has two carboxylic acid groups (-COOH) and a four-carbon chain in between.

3. **Structure of Hexamethylenediamine**: Hexamethylenediamine is an amine with the formula NH2-(CH2)6-NH2. It contains two amine groups (-NH2) and a six-carbon chain.

4. **Matching the Structures with Options**: We need to look at the provided options and match them with the structures of adipic acid and hexamethylenediamine.

- **Option 1**: COOH-(CH2)4-COOH (This matches adipic acid) and NH2-(CH2)4 (This does not match hexamethylenediamine).
- **Option 2**: CWH-(CH2)6 (This does not match adipic acid).
- **Option 3**: COOH-(CH2)4-COOH (This matches adipic acid) and NH2-(CH2)6-NH2 (This matches hexamethylenediamine).
- **Option 4**: CWH-(CH2)6 (This does not match adipic acid).

5. **Conclusion**: The correct option that contains both monomers (adipic acid and hexamethylenediamine) is **Option 3**.

### Final Answer:
The two monomers for the synthesis of Nylon 6,6 are adipic acid and hexamethylenediamine.