Which of the following set of polymers contains same monomer which is used to prepare urotropine on reaction with `NH_(3)`?

Options

A. Glyptal, urea -formaldehyde resin, Nylon-6,6
B. Glyptal, urea-formaldehyde resin, melamine-formaldehyde resin
C. Nylon-6, urea formaldehyde resin, melamine-formaldehyde resin
D. Nylon-6, glyptal, Nylon-6,6

Answer

To solve the question, we need to identify which set of polymers contains the same monomer that is used to prepare urotropine (hexamethylene tetramine) when reacted with ammonia (NH₃).

### Step-by-Step Solution:

1. **Understanding Urotropine Formation**:
- Urotropine is formed from the reaction of formaldehyde (HCHO) and ammonia (NH₃). The reaction leads to the formation of hexamethylene tetramine, which has a structure consisting of multiple methylene (-CH₂-) groups linked by nitrogen atoms.

2. **Identifying the Monomer**:
- The monomer used to prepare urotropine is formaldehyde. Therefore, we need to look for polymers that utilize formaldehyde as a monomer.

3. **Analyzing the Given Polymers**:
- We need to check the polymers listed in the options to see which ones are derived from formaldehyde:
- **Urea-formaldehyde resin**: This polymer is made from urea and formaldehyde. It contains formaldehyde as a monomer.
- **Melamine-formaldehyde resin**: This polymer is made from melamine and formaldehyde. It also contains formaldehyde as a monomer.
- **Gliptal**: This is a polymer formed from the reaction of phthalic acid and glycerol, which does not involve formaldehyde.

4. **Conclusion**:
- The polymers that contain formaldehyde as a monomer are the urea-formaldehyde resin and melamine-formaldehyde resin. Therefore, the correct answer is the set of polymers that includes these two.

### Final Answer:
The set of polymers that contains the same monomer used to prepare urotropine on reaction with NH₃ is **Urea-formaldehyde resin and Melamine-formaldehyde resin**.