In a parliamentary government system, the legislature (typically called the parliament or the legislative branch) gains a priority over the executive branch. This means that the legislature holds more power and influence in the decision-making process compared to the executive branch (headed by the prime minister or president). The executive branch is responsible for implementing and enforcing laws, while the legislature is responsible for creating and approving legislation.

In a parliamentary government, the executive branch is formed by members of the legislature, usually from the majority party or coalition. This close relationship between the legislature and the executive gives the parliament more control and oversight over the executive`s actions. This system promotes a greater degree of accountability and allows the legislature to curb any abuse of power by the executive branch. Therefore, option 4, a parliamentary government, is the correct choice.