If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is

If 2% solution of a sewage sample is incubated for 5 days at 20°C an

1.	If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is
A.	200 ppm
B.	225 ppm
C.	250 ppm
D.	None of these
Answer» D. None of these