Water purification involves the following steps. Place then in the correct order. I. aeration IV. coarse filtration II.

[answerhappygod]

Water purification involves the following steps. Place then inthe correct order.
I.
aeration
IV.
coarse filtration
II.
addition of alum and lime
V.
sand filtration
III.
chlorination
VI.
settling
a.
I-III-II-VI-IV-V
b.
III-V-IV-II-VI-I
c.
IV-II-VI-V-I-III
d.
II-VI-I-IV-V-III
e.
II-I-III-VI-IV-V