What is the ratio in which coal, sand and garnet are present in the m – McqOptions

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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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