- Pakistan
- China
- India
- United States
- B
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There are 143 countries in the world that have irrigation system.
China has largest irrigation system in the world. China has irrigation system on 21.3% of its area.
India has second largest irrigation system in the world. China has irrigation system on 20.6% of its area.
US has third largest irrigation system in the world.
Pakistan has fourth largest irrigation system in the world.
