Correct Option (D)
The principle of Dyarchy, introduced by the Government of India Act of 1919, specifically referred to the division of provincial subjects into two categories: Reserved and Transferred. This administrative arrangement aimed to provide limited self-governance to Indians while retaining ultimate British control over crucial areas.
Incorrect Options:
A) Division of the central legislature into two houses: This refers to bicameralism, which was also introduced at the central level by the Government of India Act of 1919, but it is distinct from the concept of Dyarchy.
B) Introduction of double government i.e., Central and State governments: This describes a federal structure, where powers are divided between central and state governments. While the Government of India Act of 1935 later introduced a federal scheme, the 1919 Act's Dyarchy specifically concerned the provincial administration, not a general division between central and state governments.
C) Having two sets of rulers; one in London and another in Delhi: This broadly describes the colonial administrative structure where ultimate authority rested in London, with a subordinate government in Delhi. However, Dyarchy was a specific administrative reform within the provincial government structure, not a general description of the dual centers of power.