1.

WHAT_IS_THE_RATIO_IN_WHICH_COAL,_SAND_AND_GARNET_ARE_PRESENT_IN_THE_MIXED_MEDIA_FILTER??$

A. 2: 3: 5
B. 4: 2: 1
C. 6: 3: 1
D. 1: 2: 3
Answer» D. 1: 2: 3


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