The impurities present in sewage may contain:
(a) Organic impurities
(b) Inorganic impurities
(c) Nutrients
(d) None of these
Answers
Answered by
0
Answer:
opt a
(a) Organic impurities
Answered by
0
Answer:
your option d is wrong
option (d) is All of these
and option d is right
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