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Social & Preventive Medicine Environment and health 80666186

The biological oxygen demand indicates-

A
Organic matter
B
Bacterial content
C
Anaerobic bacteria
D
Chemicals
High-Yield Explanation
Park's textbook of preventive and social medicine 23rd edition. *Aim of sewage treatment is to stabilize the organic matter,the strength of sewage is expressed in terms of biological oxygen demand.
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