Which of the following sequence is correct with respect to the Delhi Dynasties ?

Rajput dynasties, Khalji dynasty, Tughluq dynasty 

The correct answer is Option 4- Rajput dynasties, Khalji dynasty, Tughluq dynasty

Rajput Dynasties were amongst the first to rule over Delhi after the Tomars.

Here's the order of the Delhi Sultanates:

Slave Dynasty (Early Turkish Rulers) (1206-1290)
Khalji Dynasty (1290-1320)
Tughlaq Dynasty (1320-1414)
Sayyid Dynasty (1414-1451)
Lodi Dynasty (1451-1526)