Question:

The longest irrigation canal in India is called

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It was once called the Rajasthan Canal and carries Sutlej and Beas water into the Thar desert.
Updated On: Jul 17, 2026
  • Upper Bari Doab Canal
  • Indira Gandhi Canal
  • Sirhind Canal
  • Yamuna Canal
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The Correct Option is B

Solution and Explanation

Step 1: Understanding the Question:
An irrigation canal carries river water to farmland. The question asks which canal in India is the longest of its kind.

Step 2: Key Formula or Approach:
Compare the lengths of the four canals and pick the one with the biggest figure.

Step 3: Detailed Explanation:
The Indira Gandhi Canal, earlier called the Rajasthan Canal, is the longest irrigation canal in India. It starts at the Harike Barrage in Punjab, just below the meeting point of the Beas and the Sutlej, and carries water deep into the Thar desert of western Rajasthan, ending near Jaisalmer. Counting the feeder plus the main canal, the system stretches for roughly 650 km, and it turned dry districts such as Sri Ganganagar, Bikaner and Jaisalmer into cropland.
Why the other options fail:
The Upper Bari Doab Canal draws from the Ravi at Madhopur and irrigates parts of Punjab, but it is a much shorter system.
The Sirhind Canal takes off from the Sutlej at Ropar and serves Punjab and Haryana, again over a far smaller length.
The Yamuna Canal system, both Western and Eastern, is one of the oldest in the country but is nowhere close to the Indira Gandhi Canal in length.

Step 4: Final Answer:
The longest irrigation canal in India is the Indira Gandhi Canal, option (B).
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