Manya wanted to perform the treatment of polluted water at home. According to you, what should be the order of these steps to purify the water.
1. Sedimentation 2. Aeration 3. Sieving 4. Decantation
2 - 1 - 3 - 4
3 - 1 - 4 - 2
1 - 3 - 4 - 2
4 - 1 - 3 - 2
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