उत्तर : 4. "अनिश्चित काल के लिए"
व्याख्या :

A pocket veto is a kind of veto enjoyed by the President of India by keeping a bill on his table indefinitely without giving or refusing assent. He will not take any action on the bill under Pocket veto. The first president to use Pocket Veto was Gyani Zail Singh.