Which is not a property of synthetic fibres?
They get wrinkled very fast.
Explanation for the correct option:
Fibres: Fibres are long, thin and flexible thread-like structures that are spun into yarns and then used as fabrics. Fibres can be natural or synthetic.
Synthetic fibres: Synthetic fibres are man-made fibres.
Characteristics of synthetic fibres are:
Explanation for the incorrect options:
Options (a), (b) and (d) i.e.; they catch fire easily, they are long lasting and they are easy to wash are the properties of synthetic fibres.
Hence, option (c) is correct.