The permissible limit of Biochemical-oxygen demand in water to be supplied in houses should be (in PPM)

The permissible limit of Biochemical-oxygen demand in water to be supp

1.	The permissible limit of Biochemical-oxygen demand in water to be supplied in houses should be (in PPM)
A.	Zero
B.	150
C.	100
D.	200
Answer» B. 150