The correct answer is D. All of these.
The Ghaggar-Yamuna doab is a region in northern India that lies between the Ghaggar River and the Yamuna River. The region is home to a number of rivers, including the Markanda, Saraswati, and Chautang.
The Markanda River is a tributary of the Ghaggar River. It originates in the Shivalik Hills and flows through the states of Haryana and Punjab. The Markanda River is a major source of irrigation for the region.
The Saraswati River is a seasonal river that flows through the states of Haryana, Rajasthan, and Uttar Pradesh. The Saraswati River is considered to be one of the most sacred rivers in Hinduism.
The Chautang River is a tributary of the Yamuna River. It originates in the Shivalik Hills and flows through the states of Haryana and Punjab. The Chautang River is a major source of irrigation for the region.
The Ghaggar-Yamuna doab is a fertile region that is home to a number of important cities, including Chandigarh, Ambala, and Kurukshetra. The region is also home to a number of historical sites, including the ruins of the ancient city of Indraprastha.