The principle that the framing of the new Constitution for independent

The principle that the framing of the new Constitution for independent India should be primarily (though not solely) the responsibility of Indians themselves, was for the first time conceded in the

Government of India Act, 1935
August Offer of Viceroy Linlithgow
Cripps Proposals
Cabinet Mission
This question was previously asked in
UPSC NDA-2 – 2020
The August Offer of 1940, made by Viceroy Linlithgow, was the first time the British government officially acknowledged that the framing of the future constitution of India should be primarily the responsibility of Indians. The offer proposed the setting up of a representative Indian body after the war to devise a new constitution. While the offer had limitations and was rejected by Indian political parties, it marked a significant shift in British policy regarding India’s constitutional future.
The August Offer was the initial British concession to the Indian demand for a Constituent Assembly composed of Indians.
The Government of India Act, 1935, was enacted by the British Parliament and did not give Indians the right to frame their own constitution. The Cripps Proposals (1942) refined the idea of a constituent assembly but came later. The Cabinet Mission (1946) Plan actually led to the formation of the Constituent Assembly, which drafted the Indian Constitution, but the principle was conceded earlier in the August Offer.