Refer to the given dichotomous key and select the incorrect option regarding P, Q, R, S and T.
AFibre Q is obtained from the non-feeding stage of an insect.
BFibre P does not melt on heating.
CFibre R can be used in winter clothing while fibre S can be used in making water-proof items.
D Fibre T can be obtained from Angora goat and has been nicknamed as diamond fibre due to its high luster and sheen.
nylon does melt