The depicted diagram represents the effect of sewage discharge on some important characteristics of the river

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Peak A – Sharp increase in BOD, the disappearance of clean water organisms.Peak B – Increase in dissolved oxygen, the reappearance of clean water organisms.

Peak A – Increase in dissolved oxygen, the reappearance of clean water organisms.Peak B- Sharp decline in dissolved oxygen disappearance of clean water organisms.

Peak A – Sharp increase in BOD, appearance of clean water organisms.Peak B – Increase in dissolved oxygen, the disappearance of clean water organisms

Peak A – Increased number of anaerobic bacteria, the disappearance of clean water organisms.Peak B – Sharp decline in dissolved oxygen, the reappearance of clean water organisms.

answer is A.

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Detailed Solution

Peak A – Sharp increase in BOD, the disappearance of clean water organisms. Peak B – Increase in dissolved oxygen, the reappearance of clean water organisms

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