Which of the following is not true of the Chauhans of Shakambhari ?

The early Chauhans (Chahamanas) of Shakambhari were feudatories of the Gurjara-Pratiharas, and Guvaka I served at the Pratihara court as a vassal, whereas the later ruler Simharaja first assumed the imperial title Maharajadhiraja. Therefore, the statement "Guvaka is supposed to be the first independent Chauhan ruler." is not true. Ajayaraja founded the city of Ajmer (Ajayameru), and Prithviraj III was one of the dynasty's greatest rulers.