Which Mewar King constructed Vijay Stambha at Chittorgarh in 1448?

Rana Kumbha

The correct answer is Option  3- Rana Kumbha

The Mewar king who constructed the Vijay Stambha at Chittorgarh in 1448 was Rana Kumbha. He was the 28th king of Mewar and ruled from 1433 to 1468.

The Vijay Stambha is a 90-foot tall tower that was built to commemorate Rana Kumbha's victory over the combined armies of Malwa and Gujarat led by Mahmud Khilji in the Battle of Sarangpur. The tower is a UNESCO World Heritage Site and is one of the most iconic landmarks of Rajasthan.

The other kings mentioned in the question, Maharana Pratap, Ratan Singh, and Rana Sanga, all lived after 1448. Therefore, they could not have constructed the Vijay Stambha.