Answer : 1. "1290 to 1320"
Explanation :

1. The Khilji dynasty ruled Delhi from 1290 to 1320.

2. The founder of this dynasty was Jalaluddin Firoz Khilji, who gained power by killing Kaiqubad in 1290.

3. The most famous ruler of this dynasty was Alauddin Khilji, who ruled from 1296 to 1316.

4. Alauddin Khilji had conquered Chittor, a powerful state of Rajputana, in 1303 AD.

5. There were two great generals Ulugh Khan and Nusrat Khan in the Khilji dynasty.

6. Also worked on Alauddin Khilji's market system and land revenue administration.