The correct answer is: C. Hisar
Hisar is a district in the Indian state of Haryana. It is located in the northern part of the state and is bordered by the districts of Sirsa, Fatehabad, Jind, Kurukshetra, Ambala, Karnal, and Panipat. The district has a population of over 2.5 million people and is the third most populous district in Haryana.
Hisar is a major agricultural district and is known for its production of wheat, rice, and cotton. The district is also home to a number of industries, including textiles, engineering, and pharmaceuticals.
Hisar is a historical city and is home to a number of historical monuments, including the Hisar Fort, the Lal Mandir, and the Shahi Eidgah. The city is also home to a number of educational institutions, including the University of Hisar and the Maharshi Dayanand University.
The following are the seven districts that share a border with Hisar:
- Sirsa
- Fatehabad
- Jind
- Kurukshetra
- Ambala
- Karnal
- Panipat