The correct answer is C. Parliamentary
Step-by-step explanation:
In parliamentary government, the legislative power is held by a group of individuals of the same party or the Parliament. Besides this, the government's head is the Prime minister, who leads actions in the legislative and executive branch according to the parliament, and in some cases according to a King or Queen (Head of the state). This government differs from a democratic system because instead of having three defined separated powers the power is held by different figures that include the Prime Minister, the monarch and the parliament.
This means the description refers to a parliamentary system because in this system, there is no clear separation of powers, and the heads are the Prime Minister and the King or Queen. Also, it is in the United Kingdom, Belgium, and Australia where this system exists.