Given below are two statements. In the light of the above statements, choose the correct answer from the options given below.

Statement I:Turbulent and rapidly flowing waters are generally depleted in oxygen.

Statement II:Adding organic materials such as sewage or paper pulp to water stimulates activity and oxygen consumption by decomposers.

ABoth Statement I and Statement II are correct

BBoth Statement I and Statement II are incorrect

CStatement I is correct but Statement II is incorrect

DStatement I is incorrect but Statement II is correct ✓ Correct

Correct answer: (D) Statement I is incorrect but Statement II is correct

Explanation

Turbulent, fast-flowing water mixes with air and is usually rich in oxygen, not depleted, so Statement 1 is wrong.

The churning surface constantly dissolves atmospheric oxygen into the water.

Statement 2 is correct because added organic matter feeds decomposers.

Their activity and oxygen consumption rise as they break down sewage or paper pulp.

The first statement fails while the second holds.

Heavy organic loading can drive oxygen so low that fish die.

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