Nylon is an example of thermoplastic
$
  (a){\text{ True}} \\
  {\text{(b) False}} \\
 $

Hint – Think of the idea in this question that when warm, nylon loses its shape and regains it when cooled. It will also reflect on whether or not nylon is thermoplastic as this trend is commonly demonstrated by thermoplastics.

Complete answer:
Thermoplastic is a material , usually a plastic polymer that is softer when heated and hard when cooled (i.e., when warm, it loses its shape, and when cooled, it regains its shape).
Thermoplastic materials can be heated and cooled several times without altering their chemical or mechanical properties.
Once heated to their melting point, thermoplastics turn into liquid.

For example: Nylon, PVC, polystyrene, etc.
The Nylon is a silky, thermoplastic substance that can be melted into fibers.
So that's the response needed.

Hence option (A) is the correct answer.

Note –A thermoplastic is a plastic polymer material, which at a certain elevated temperature becomes pliable or moldable and solidifies when cooling. With increased temperature, the polymer chains associated with intermolecular forces rapidly weaken, yielding a viscous liquid. In general, the polymers are thermoplastic. Nylon is made of repeating units linked by amide bonds similar to the peptide bonds in proteins that allow it to show thermoplastic polymer tendencies.