WAEC - Government (2013 - No. 16)
The system of government in which the president acts as the head of state and the head of government is
diarchy
Presidential
unitary
parliamentary
Açıklama
A presidential system is a democratic and republican government in which a head of government leads an executive branch that is separate from the legislative branch. This head of government is in most cases also the head of state, which is called president.