Explanation:

- The Khalji Dynasty ruled over Delhi from 1290 to 1320 C.E.

- Correct Answer: Option 1 - 1290 to 1320

- Option 1: 1290 to 1320

- This is the correct time span during which the Khalji Dynasty ruled over the Delhi Sultanate.

- Option 2: 1206 to 1290

- These years pertain to the rule of the Mamluk or Slave Dynasty, not the Khalji Dynasty.

- Option 3: 1320 to 1414

- This period marks the rule of the Tughlaq Dynasty.

- Option 4: 1414 to 1451

- During these years, the Sayyid Dynasty was in power.