Correct Option (A)
On 8th August 1942, the All India Congress Committee (AICC) convened at Gowalia Tank Maidan in Bombay and formally adopted the historic Quit India Resolution. This resolution called for an immediate end to British rule in India and initiated the Quit India Movement. Mahatma Gandhi delivered his famous "Do or Die" speech on this occasion, urging mass civil disobedience. The adoption of the resolution was swiftly followed by the arrest of prominent Congress leaders across the country.
Incorrect Options:
The Viceroy's Executive Council was expanded to include more Indians in 1946, as part of the formation of the Interim Government, not on 8th August 1942.
The Congress ministries in seven provinces resigned in October-November 1939. This action was a protest against Viceroy Lord Linlithgow's unilateral declaration that India was a belligerent in World War II without consulting Indian political leaders. This event did not take place on 8th August 1942.
The Cripps Mission, which arrived in India in March 1942, proposed the creation of an Indian Union with full Dominion Status after the Second World War. While this proposal was made in 1942, it occurred several months before 8th August 1942 and was not related to the events of that specific date.