Chief Minister Conrad Sangma's National People's Party (NPP) will emerge as the single largest party in Meghalaya with 20 seats, showed a poll of exit polls on Monday. Trinamool Congress, the party of West Bengal Chief Minister Mamata Banerjee, will win 11 seats while the BJP and Congress will finish third with six seats each in the race to the 60-seat assembly, showed a tally of the exit polls.