The correct option is C Withdrawal of support by one or more parties in a coalition government.
Whenever coalition governments are formed at the Centre, the parties which form the alliance bring their own ideologies and plans to the table. All these programs and ideas have to be accumulated, and a common agreement has to be arrived at. When the coalition does not implement the policies that call for serious changes, there is a distinct possibility of the withdrawal of support by one or more parties involved. This leads to a situation called ‘policy paralysis’.