NEET Biology question

Not in NEET syllabus

Thinking-type: A water sample from a river near a sewage outlet shows a very high BOD. What can be reasonably inferred?

(A)The water contains a large amount of organic pollutant matter requiring high microbial oxygen consumption for its breakdownCorrect
(B)The water is completely free of microorganisms
(C)The water has very low organic content
(D)The water is safe for immediate drinking

Answer: (A)

Solution

A high BOD value directly indicates a large amount of biodegradable organic matter, since more oxygen would be

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Question ID VK-124776