Explanation:

- Option 1: Cabinet Mission

- In 1946, the British government sent the Cabinet Mission to India to discuss the transfer of power.

- This plan proposed a united India and provided for a federal government.

- M.A. Jinnah and certain sections of the Muslim League expressed willingness to give up separate electorates.

- They agreed under specific conditions involving central and provincial allocations of power.

- Option 2: Simon Commission

- The Simon Commission was sent in 1928 to study constitutional reform in India.

- It faced opposition and was boycotted because it lacked Indian representation.

- This event didn't involve discussions on separate electorates or joint electorates by the League.

- Option 3: Wavell Plan

- Proposed by the then Viceroy, Lord Wavell, in 1945.

- Aimed at reconstructing the Executive Council of the Viceroy.

- Focused on including Indians but didn't address joint electorates.

- Option 4: None of the above

- This option suggests that none of the listed events involved Jinnah’s willingness to favor a joint electorate.