100. Which of the following groups contains all
synthetic substances?
(A) nylon, terylene, wool
(B) cotton, polycot, rayon
(C) PVC, polythene, bakelite
(D) acrylic, silk, wool
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Answer:
option c
Explanation:
as we go through the options
in option A- wool is natural
in option B- cotton is natural
in option D- wool is natural
so option c is correct
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