The correct answer is: C. Hisar
Fort of Georgegarh (Jahazgarh) is located in Hisar district of Haryana. It is a 16th-century fort built by Raja Man Singh Tomar. The fort is located on a hilltop and has a commanding view of the surrounding area. It is a popular tourist destination and is known for its architecture and history.
Option A is incorrect because Sirsa is a district in Haryana. However, the Fort of Georgegarh (Jahazgarh) is not located in Sirsa.
Option B is incorrect because Rohtak is a district in Haryana. However, the Fort of Georgegarh (Jahazgarh) is not located in Rohtak.
Option D is incorrect because Jhajjar is a district in Haryana. However, the Fort of Georgegarh (Jahazgarh) is not located in Jhajjar.