Explanation:

- Option 1: 1927

- The Simon Commission, which excluded Indian representation, visited India in 1927. However, this is unrelated to the Cripps Mission.

- Option 2: 1946

- This year marks the visit of the Cabinet Mission to India, aimed at discussing the transfer of power. It came after World War II.

- Option 3: 1939

- This year was significant due to the outbreak of World War II and its impact on India but not for the Cripps Mission.

- Option 4: 1942

- The Cripps Mission visited India in 1942 to gain Indian support for the British war effort during World War II. This mission proposed dominion status for India after the war.