The correct options are
A There is Separation of powers.
B President owes responsibility to legislature.
D President is the head of the government.
The President has more authority in a presidential form of Government. The President is elected by an electoral college for a fixed tenure of four years. The main principle followed is the separation of powers. This means that the legislative, executive and judicial powers of the government are separated and vested in three independent organs of the government. The president does not owe responsibility to the legislature.