Assertion (A): 96.5% of the total volume of world’s water is estimated to exist in oceans.

Reason (R): Only 3.5% of water exists as fresh water.

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Both (A) and (R) are true and (R) is the correct explanation of (A).

Both (A) and (R) are true and but (R) is the correct explanation of (A).

(A) is correct but (R) is wrong.

(A) is wrong but (R) is correct.

answer is A.

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Detailed Solution

Both the reason and assertion are valid, and the reason is the correct explanation of the assertion. Glaciers contain 2.1 per cent of the world's total frozen water. The oceans and inland seas account for 96.5%. Glaciers account for 2.1 per cent. Less than 1% of the atmosphere is contained in the groundwater and soil, and less than 1% is found in lakes and rivers. All live plants and animals contain less than 1%.
Glaciers hold about 75 per cent of the freshwater on Earth. As a result, glacier ice is the world's largest freshwater reservoir and the second largest body of water on Earth.

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