A few hours before his call for Bihar bandh call on January 12, Independent MP from Purnea, Rajesh Ranjan alias Pappu Yadav, on Saturday stated that he, along with Azad Party founder Chandrashekhar Azad and All India Majlis-e-Ittehadul Muslimeen (AIMIM) chief Asaduddin Owaisi, is collaborating on the Bihar Public Service Commission (BPSC) Preliminary Exam issue and will not let the House function from March 21.