The correct answer is option 2, Anna Hajare. Anna Hajare played a key role in the formation of the Lokpal Bill in India. The Lokpal Bill, also known as the Anti-Corruption Bill, is an important legislation aimed at creating an ombudsman to investigate corruption cases involving public officials.
Option 1, Vipin Hazarika, option 3, Baba Amte, and option 4, Medha Patekar, are not correct answers. While these individuals have made significant contributions in various fields, they are not specifically associated with the formation of the Lokpal Bill.
It is important to note that other activists and politicians also played important roles in advocating for the Lokpal Bill, but it was Anna Hajare who emerged as a prominent figure and led a nationwide movement for its implementation.