Listing out options for the Congress after the Lok Sabha polls, Maharashtra Chief Minster Prithviraj Chavan fuelled fresh speculations about the possibilty of Congress's support for a third front government. "There are many reasons behind Congrss doing well in Mumbai. The possibility of Third front and Congress remains open," he said. br br In an exclusive interview, Chavan also said that BJP led by its prime ministerial candidate Narendra Modi will not be able to get more than 170-180 seats. "Opinion polls and surveys have been wrong in the past. The same happened in 2009, UPA was given lesser seats," he said.