Fewpal
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(i) Wood, paper, leather
(ii) Polythene, detergent, PVC
(iii) Plastic, detergent, grass
(iv) Plastic, bakelite, DDT
(a) (iii) (b) (iv)
(c) (i) and (iii) (d) (ii) and (iv)

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(d) (ii) and (iv)

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