Who among the following was the successor to Peshwa Baji Rao II?

Nana Sahib

The correct answer is Option 2 - Nana Sahib

In Kanpur, the sepoys and the people of the town gave Nana Sahib, the successor to Peshwa Baji Rao II, no choice but to join the revolt of 1857 as their leader. 

At the end of 1858, when the rebellion collapsed, Nana Sahib escaped to Nepal. The story of his escape added to the legend of Nana Sahib’s courage and valour.