757. If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is_________________? September 7, 2025 by Admin A. 100 mg/l B. 200 mg/l C. 300 mg/l D. 400 mg/l ✅ The correct answer is option D.
