Which city was settled by Bilvaraj Chauhan, the younger son of Prithviraj Chauhan?

The correct answer is: C. Hisar

Bilvaraj Chauhan was the younger son of Prithviraj Chauhan, the last Hindu king of Delhi. He was born in 1166 CE and died in 1192 CE. Bilvaraj Chauhan was a brave and capable warrior, and he fought bravely against the invading Muslim armies. However, he was eventually defeated by Muhammad Ghori in the Battle of Tarain in 1192 CE. After his defeat, Bilvaraj Chauhan fled to Hisar, where he settled and founded a new city. The city of Hisar is still in existence today, and it is one of the most important cities in the state of Haryana.

The other options are incorrect because:

• Charkhi-Dadri is a town in the state of Haryana, India. It is located in the district of Faridabad.
• Sirsa is a city in the state of Haryana, India. It is located in the district of Sirsa.
• Jind is a city in the state of Haryana, India. It is located in the district of Jind.