The correct answer is: A. Ambala
The Markanda River is a tributary of the Yamuna River in India. It originates in the Shivalik Hills in the state of Himachal Pradesh and flows through the states of Haryana and Uttar Pradesh. The river enters Haryana from the district of Ambala.
The Markanda River is a perennial river and its water is used for irrigation, drinking water, and industrial purposes. The river is also a popular destination for fishing and boating.
The Markanda River is a significant river in the Indian subcontinent and it plays an important role in the lives of the people who live in its basin.
Option A: Ambala is the correct answer because the Markanda River enters Haryana from the district of Ambala.
Option B: Faridabad is incorrect because the Markanda River does not enter Haryana from the district of Faridabad.
Option C: Hisar is incorrect because the Markanda River does not enter Haryana from the district of Hisar.
Option D: Sonipat is incorrect because the Markanda River does not enter Haryana from the district of Sonipat.