Explanation:

Mahadji Scindia (Correct): While the ancient city of Gwalior was founded by Suraj Sen in the 8th century, this question, with Scindia rulers as options, refers to the Scindia dynasty's establishment of Gwalior as their capital. Mahadji Scindia (1730–1794) was a powerful Maratha ruler of the Scindia dynasty who was instrumental in making Gwalior the capital of the Scindia state and transforming it into a prominent city in the late 18th century. Madhavrao Scindia: He was a prominent Indian politician (1945–2001) and a descendant, not a founder. Bajirao Scindia: There is no prominent Scindia ruler named Bajirao; Bajirao I was a Maratha Peshwa. Jiwajirao Scindia: He was the last ruling Maharaja of Gwalior State (1916–1961), not a founder.