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Punjab and haryana exploit more than 85% of ground water for irrigation. This is due to:
1. low surface water availability.
2. impact of Green revolution.
3. change in cropping pattern with an increased preference for rice.
Select the correct answer using the codes given below.

1 and 2 only
1 and 3 only
2 and 3 only
1, 2 and 3
Explanation:
The first two statements are self explanatory. The third statement about change in cropping pattern is also correct. Punjab and Haryana region are best suited for wheat, but farmers are increasingly growing rice there. Punjab and Haryana are battling with crop diversification to reduce depletion of groundwater due to higher area under water-guzzling paddy crop. To irrigate their fields, farmers in both states draw groundwater using tubewells, which has lowered the water table to alarming levels, even if rainfall is deficient or scanty.
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