The 31 seats are spread across West Midnapore, Bankura and Burdwan districts where altogether 163 candidates, including 21 women are in the fray.
Voting will be held from 7 AM to 6 PM and 70 lakh voters will exercise their franchise on the day, they said.
West Bengal Leader of Opposition Surjya Kanta Mishra, a five-time MLA from Narayangarh seat, is the most high-profile candidate in this phase.
91-year-old Gyan Singh Sohanpal, the senior most member in the assembly, is in the fray again from Kharagpur Sadar seat. Fondly called 'Chacha', Sohanpal is pitted against BJP state president Dilip Ghosh.
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Two newbies - Bengali film actor Soham Chakraborty and Colonel (retired) Diptanshu Chaudhury, who had fought in the Kargil War, are trying their luck in politics on Trinamool Congress and BJP tickets from Barjora seats in Bankura and Asansol south seats respectively.
face of the party has been campaigning extensively daily.
Besides the Saradha chitfund scam, opposition parties have been targeting the TMC government on the recent Narada sting operation where party leaders were purportedly seen accepting bribe.
Polling will be held at 8,465 polling stations amid tight security.
Central Armed Police Forces have been mandated the responsibility of handling situation inside the booths, while the state police forces are involved in other jobs like maintaining queues and managing crowds.
Of the about 70 lakh voters in this part of the phase 33.6 lakh are women, while the third gender voters number only 50, Election Office sources said.