Power Elite according to C. Wright Mills
The correct option here would be the third option.
It is only in the parliamentary states that the prime minister acts as the head of the national government. Here the head of state and the head of government are two different people as opposed to the presidential system where the president is both. A good example of a parliamentary state is Canada while a good example of the presidential state is the US.
Depends on what kind of policy they are asking for it could be foreign-policy to be trading policy or anything else
