The correct option is D Parliamentary system leads to uncertainty of Tenure.
The Legislature and Executive are interdependent, and both have great power, the relationship between them is usually peaceful. There is also a wider representation of needs while making policies and laws. This system ensures that the government is held responsible for its actions, and there is much less scope for authoritarian rule. The ability of the legislature to remove the government and the role of party politics can often lead to situations where the government is unstable. This uncertainty of tenure is considered as one of the drawbacks of the parliamentary system of government.