Which of the following was the only ministry made over for Indian members of the Imperial Legislative Council under the Mont-Ford Act?

Under the Government of India Act 1919 (Montagu-Chelmsford Reforms), Dyarchy was introduced in the provinces, not at the central level (Imperial Legislative Council). At the central level, the executive council remained responsible only to the Secretary of State, and key portfolios like Defence and Home were strictly retained by the British. Therefore, none of these central ministries were handed over to Indian members in the manner described.