Main sources of irrigation in Uttar Pradesh -
1. Canal
2. Tubewell
3. Ponds & Wells
4. Other sources
The correct order based on their importance is -
A. 1, 2, 3, 4
B. 2, 1, 3, 4
C. 2, 4, 1, 3
D. 1, 4, 2, 3
Answer: Option B

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