Jammu irrigates its region from which of the following canal systems?

The correct answer is D. All of the above.

The Ranbir Canal System is a canal system in the Indian state of Jammu and Kashmir. It was built in the early 20th century to irrigate the Jammu region. The canal system is about 250 kilometers long and has a command area of about 100,000 hectares.

The Pratap Canal System is a canal system in the Indian state of Jammu and Kashmir. It was built in the early 20th century to irrigate the Poonch region. The canal system is about 150 kilometers long and has a command area of about 50,000 hectares.

The Ravi-Tawi Irrigation Complex is a canal system in the Indian state of Jammu and Kashmir. It was built in the early 20th century to irrigate the Jammu region. The canal system is about 300 kilometers long and has a command area of about 150,000 hectares.

All three canal systems are important for the irrigation of the Jammu region. They provide water for agriculture, drinking water, and industrial use.