Explanation: Government of India Act of 1919 divided the provincial subjects into two parts– transferred and reserved.

• The transferred subjects were to be administered by the Governor with the aid of Ministers responsible to the legislative council.
• The reserved subjects, on the other hand, were to be administered by the Governor and his executive council without being responsible to the legislative council.
• This dual scheme of governance was known as ‘dyarchy’–a term derived from the Greek word diarche which means double rule. However, this experiment was largely unsuccessful.

Source: Laxmikanth Polity