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In the following groups of materials, wh...

In the following groups of materials, which group/groups contain only non-biodegradable materials ?
(i) wood, paper, leather
(ii) polythene, detergent, PVC
(iii) plastic, detergent, grass
(iv) plastic, bakelite, DDT

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In the following groups of materials, which group(s) contains only non-biodegradable items ? (i) Wood, paper, leather, (ii) Polythene, detergent, PVC (iii) Plastic, detergent, grass, (iv) Plastic, bakelite, DDT

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Which of the following groups contain only biodegradable items?

Which of the following group contain only biodegradable items ?

Which of the following groups contain only biodegradable items?

Which of the following groups contain only biodegradable items ?