For complete stabilisation of organic matter in polluted water, it takes (A) 5 days (B) 10 days (C) 20 days (D) 30 days

For complete stabilisation of organic matter in polluted water, it takes 

(A) 5 days 

(B) 10 days 

(C) 20 days 

(D) 30 days 

by

1 Answer

Answer :

(D) 30 days 

by

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