which one of the following is a step in waste water
a) aeration
b)filtration
c)cholorination
d)all of these
Answers
Answered by
6
Answer:
(d) all of these is right answer
Which one of the following is a step in wastewater treatment?
(a) Aeration
(b) Filtration
(c) Chlorination
(d) All of these
Answer
Answer: (d) All of these
Answered by
2
Answer:
option d all of these is correct answer
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