Correct Option
The Indian Councils Act of 1909, also known as the Morley-Minto Reforms, was the shortest-lived constitutional experiment by Britain in India. It was in effect for approximately 10 years, from its enactment until its replacement by the Government of India Act of 1919. This Act introduced separate electorates for Muslims, a significant step towards communal representation. It also increased the size of legislative councils and allowed for the appointment of Indians to the Executive Councils of the Viceroy and Governors, though the powers of Indian members remained limited.
Incorrect Options
The other options represent constitutional acts that had longer durations:
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Indian Council Act of 1861: This Act remained in force for 31 years (1861-1892). It introduced the portfolio system and allowed for the nomination of Indians to the legislative council.
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Indian Council Act of 1892: This Act lasted for 17 years (1892-1909). It increased the number of additional members in legislative councils and introduced the principle of indirect election.
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Government of India Act of 1919: Also known as the Montagu-Chelmsford Reforms, this Act was effective for 16 years (1919-1935). It introduced dyarchy in the provinces and bicameralism at the central level.