UPSC Prelims 2017 Question:

The main advantage of the parliamentary form of governments is that

Explanation: 

• In a Parliamentary form of Government, the political executive is part of the legislature, thereby improving the accountability of the executive towards the legislature. So, both executive and legislature work in tandem rather than acting independently.
  
  
• However, the Parliamentary form of Government is considered less efficient than that of the Presidential form of Government given the centralization of power with the President in the later. Also, executive and legislature work independently in case of a Presidential form of Government.
  
  
• The Head of Government can be changed in Parliamentary form of government given the support of the Parliament. E.g. change of Prime Minister in case of a coalition government.
  
  

Therefore, option (3) is the correct answer.

Subject: Polity  | Forms of Government