The highest Biological Oxygen Demand (BOD) can be expected in __?

Answer: [D] Untreated Municipal waste water

BOD is amount of dissolved oxygen needed by aerobic biological organisms in a body of water to break down organic material present in a given water sample at certain temperature over a specific time period, for running rivers, it would be minimum and for Untreated Municipal waste water it would be maximum.

This question is a part of GKToday's Integrated IAS General Studies Module