A) P is the strongest natural fibre.
B) Q is made up of protein while R is made up of cellulose.
C) S is obtained from salivary gland of source organism.
D) R is composed of fibroin and sericin.
Correct Answer: D
Solution :
P, Q, R and S could be wool, cotton or coconut, silk and jute respectively. Silk is the strongest natural fibre. Animal fibres are made up of protein while plant fibres are made up of cellulose. Silk is obtained from salivary gland of silk moth.
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