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B
60%
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C
80%
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D
30%
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Solution
The correct option is A 25% Ans. 25%-Canals are useful sources of irrigation where there are perennial sources of water. Since the water availability has declined, canal as a source of irrigation has also declined. However Punjab, Haryana and certain regions in UP still use canals as their preferred source. Wells and tubewells are the most important source of irrigation today.