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Utkarsh Chakravarty from Pinnacle High International School, Mumbai

Subject :NSO Class : Class 4

Insoluble impurities are removed by _____.
(a) Sedimentation and decantation
(b) Filtration
(c) A only
(d) Both a and b

Ans 1:

AREEN from BOLTON SCHOOL, Secunderabad

I think answer is A.