Lok Sabha Speaker Om Birla has referred petitions submitted by the Trinamool Congress and the YSR Congress under the anti-defection law against their respective leaders Sisir Adhikari and K Raghu Rama Krishna Raju to the Privileges Committee. Adhikari, a Lok Sabha member from Kanthi in West Bengal, had quit the Trinamool Congress to join the BJP in March last year in the run-up to assembly elections in the state.