The correct option is C Fire-resistant
Nylon is a synthetic fibre obtained through chemical processes.
Nylon fibres are strong and durable and can be used for a long time. They are water-repellent, hence, do not get wet easily. The clothes made from these fibres are wrinkle-free.
However, they catch fire easily. Therefore, it is advised not to not wear clothes made of nylon while working in kitchen or near any other source of fire