question_answer

Sohail?s teacher asked to identify the correct order of the processes listed below to purify water and make it safe for drinking.

(i) Filtration

(ii) Sedimentation

(iii) Chlorination

(iv) Addition of chemicals

Which of the following is the correct order that Sohail arranged?

A)  (i), (iii), (iv),(ii)                 

B)  (iv), (ii), (i), (iii)

C)                         (ii), (iv), (i), (iii)   

D)         (iii), (i), (iv), (ii)