Explanation:
Diarchy (a system of dual government) was introduced in the Subcontinent by the Government of India Act 1919 (also known as the Montagu-Chelmsford Reforms). It went into practical operation in 1921 and remained in effect until 1937.
Transferred Subjects: Administered by the Governor with the advice of Indian ministers responsible to the provincial legislature (e.g., education, health, and local self-government).
Reserved Subjects: Administered by the Governor and his executive council without being responsible to the legislative council (e.g., law and order, finance, and revenue).