Who runs the government at the national level under the parliamentary system?

Correct option is B

Under the parliamentary system, the government at the national level is run by the Prime Minister and the Council of Ministers. The President is the head of state, but has a largely ceremonial role.
In a parliamentary system, the Prime Minister is the head of government and is responsible for the day-to-day running of the country. The Prime Minister is appointed by the President but must have the support of the majority of members in the Parliament.
The Prime Minister then appoints a Council of Ministers, who are responsible for different areas of government. The Council of Ministers is accountable to the Parliament and must resign if they lose the confidence of the majority of members.
The parliamentary system is a system of government in which the executive branch (the Prime Minister and Council of Ministers) is answerable to the legislative branch (the Parliament).
Note - The parliamentary system is the most common form of government in the world, and is used in countries such as the United Kingdom, Canada, and India. The presidential system is used in countries such as the United States and Brazil.