In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is

In a city the ratio of the drainage to sewage is 20, the percentage d

1.	In a city the ratio of the drainage to sewage is 20, the percentage discharge passing through non-monsoon periods, is
A.	5
B.	10
C.	15
D.	20
Answer» E.