Answer : 4. "पृथ्वी राज चौहान"
Explanation :

Prithviraja III (IAST: Pṛthvī-rāja; reign. c. 1177 – 1192 CE), popularly known as Prithviraj Chauhan or Rai Pithora, was a king from the Chauhan (Chahamana) dynasty who ruled the territory of Sapadalaksha, with his capital at Ajmer in present-day Rajasthan.