Q. Which British-era commission recommended changes to dyarchy under the Government of India Act, 1919?
Answer: Simon Commission
Notes: The Simon Commission was appointed in 1927 to review the Government of India Act, 1919. It recommended changes to the dyarchy system introduced under the 1919 Act. The Government of India Act, 1919, had stipulated a review after ten years of its implementation. Other commissions like Butler and Muddiman did not specifically focus on altering dyarchy in this period.