The correct option is D
Parliamentary form of Government adopted by the Indian constitution.
Explanation:
The Constitution of India provides for a Parliamentary form of government in the states as in the Centre. This means that India will contain the executive having a Head of the State as the nominal executive, and a Council of Ministers headed by the Prime Minister as the real executive.
Hence the President at Centre and Governor in state has been made only a nominal executive. The real executive constitutes the council of ministers headed by the Prime Minister at the centre and Chief Minister in the state.
So, the President or Governor has to exercise their powers and functions with the aid and advice of the council of ministers headed by the Prime Minister or Chief Minister, except in matters in which he is required to act in his discretion.