The last session of the existing Lok Sabha after a new Lok Sabha has been elected is called :

A lame duck session is conducted after election of new members but before they are installed. Hence, in such a session participants vote for the last time as elected officials because of their failure to get re-elected or because they are retiring voluntarily. In the US, it is a term for a person or legislature that continues to hold office after losing an election. The practice in the US of holding presidential elections in November with the winner taking office only in January means that often there are lame duck Presidents.