The chief contestants in the poll are the AINRC leader N Rangasamy heading the NDA in which the AINRC, AIADMK and BJP are the constituents.
Mamata Banerjee fended off a spirited challenge by a resurgent Bharatiya Janata Party in West Bengal with a landslide victory for her Trinamool Congress on Sunday for a third consecutive term and the saffron party and the Left Democratic Front were poised to form government again in Assam and Kerala respectively while the Dravida Munnetra Kazhagam stormed back to power in Tamil Nadu after a gap of 10 years.