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Which of the following is not biodegradable? |
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(a) |
Domestic sewage |
(b) |
Lab detergents |
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(c) |
Soap |
(d) |
Plant leaves |
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Which of the following is not biodegradable? |
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|||
|
(a) |
Domestic sewage |
(b) |
Lab detergents |
|
|
(c) |
Soap |
(d) |
Plant leaves |
|