Which of the following is a fire resistant plastic that is used in the uniforms of firefighters? 

Melamine

The correct answer is option 2. Melamine.

Melamine is a versatile material that resists the spread of fire. Compared to other polymers, it can withstand heat better. In order to protect firefighters' bodies from heat risks, it is utilized in their clothing. Additionally, it is utilized in the production of cookware, floor tiles, and in buses and airplanes to stop the spread of fire.