The correct answer is: C. Both (A) and (B).
The Markanda River is a tributary of the Yamuna River in the Indian state of Haryana. It originates in the Shivalik Hills in the Ambala district and flows through the Kurukshetra district before joining the Yamuna River in the Karnal district. The Markanda River is a major source of irrigation for the districts of Ambala and Kurukshetra. During the rainy season, the Markanda River often floods, causing damage to crops and property. The districts of Ambala and Kurukshetra are the most affected by the floods of the Markanda River.
Option A is incorrect because the Markanda River also flows through the Kurukshetra district.
Option B is incorrect because the Markanda River also flows through the Ambala district.
Option D is incorrect because the Markanda River is a major cause of floods for both the districts of Ambala and Kurukshetra.