Consider the following statement.i. The slow sand filter is not efficient in removing turbidityii. The slow sand filter has a high initial costiii. Skilled supervision is required in slow sand filterWhich of the above statement is/are correct?

Consider the following statement.i. The slow sand filter is not effici

1.	Consider the following statement.i. The slow sand filter is not efficient in removing turbidityii. The slow sand filter has a high initial costiii. Skilled supervision is required in slow sand filterWhich of the above statement is/are correct?
A.	Only iii
B.	i, ii
C.	i, ii, iii
D.	ii, iii
Answer» C. i, ii, iii