This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Air, Light, Sound, Housing, Radiation, Waste Disposal, Subject name: Social & Preventive Medicine
Strength of Sewage can be assessed by All EXCEPT 
Select and explain. 
A. Biological oxygen demand (BOD), B. Chemical oxygen demand (COD), C. Suspended solids, D. Coliform count
D: Coliform count
Answer: D: Coliform count 
Explanation: Sewage - Contains 99.9% water Strength is assessed by 1. BOD (Biological O2 Demand) - Best method O2 absorbed by sewage at 200 C 2. COD (Chemical O2 demand) 3. Suspended solids