Dyarchy was introduced in the Provinces on April 1, 1921, though it ceased to function in two Provinces for some time. The two Provinces were :

Correct option is C

The correct answer is (c). Dyarchy was introduced by the Montagu-Chelmsford Reforms (1919). In Bengal and the Central Provinces, political instability and the Swarajist policy of 'constant obstruction' led to the temporary suspension of the system.
Information Booster

• Dyarchy divided provincial subjects into 'Reserved' (held by Governor) and 'Transferred' (held by Ministers).
• The Government of India Act 1919 established this dual system of governance.
• In Bengal, the Swarajists refused to accept office, leading to a breakdown of the constitutional machinery.
• In Central Provinces, the refusal of the majority to support the budget led to the Governor taking over transferred subjects.
• Dyarchy was eventually replaced by 'Provincial Autonomy' under the 1935 Act.

• Madras: The Justice Party successfully worked the dyarchy system here for a considerable period.
• United Provinces: Now modern Uttar Pradesh; dyarchy functioned here with mixed success.
• Bihar: Formed part of the original provinces where dyarchy was implemented in 1921.