Which among the following combinations are incorrectly matched?
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a Cotton - Natural polymer
b Silk – Obtained from silk moth
c Nylon - Obtained from petroleum
d PVC – Thermosetting plastic
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The historic convention on biological diversity (The earth summit) held in Rio de Janerio was the Rio Conevention, (in 1992). It called upon all nations to take appropriate measure for sustainable utilisation and conservation of biological diversity.
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