“Dyarchy was introduced in the subcontinent by:”

"The British Government introduced dyarchy in the Indian subcontinent under the Government of India Act 1919. This system divided provincial governance into reserved and transferred subjects with the latter managed by Indian ministers. Aimed at gradual self-governance dyarchy was a limited reform that faced criticism for its restrictive scope. It marked an early step toward Indian political participation influencing subsequent constitutional developments and the independence movement while reflecting Britain’s cautious approach to colonial administration in the early 20th century."