Bahujan Samaj Party chief Mayawati on Thursdasy attacked Prime Minister Narendra Modi by calling his survey on demonetisation as "fake and sponsored" and dared him to dissolve the Lok Sabha and face elections.br br "The survey of Modiji is fake and sponsored. If he has guts then he should dissolve the Lok Sabha and face elections, then only real survey can be done," Mayawati told media outside the Parliament.