A total of 606 candidates are in the fray for the ninth phase--328 in UP, 188 in West Bengal and 90 in Bihar.
All the 18 parliamentary constituencies in UP that goes to polls on Monday are in the eastern part of the politically crucial state where 80 seats are at stake. OBCs, Muslims and Dalits form a significant part of electorate there.
This includes Azamgarh from where SP President Mulayam Singh Yadav is among the candidates. The former UP Chief Minister is contesting from eastern UP for the first time besides being in the fray from his traditional Mainpuri seat.
Union Minister and Congress leader RPN Singh and Congress turncoat Jagdambika Pal, who joined BJP recently, mafia-don turned politician Mokhtar Ansari, senior BJP leader Kalraj Mishra, Yogi-turned politician Yogi Adityanath, Bhojpuri movie star Ravi Kishan and former Prime Minister Chandrashekhar's son Neeraj Shekhar are among other candidates in the fray in UP.
In West Bengal, prominent TMC candidates in the race are Sudip Bandyopadhyay, Dinesh Trivedi and Sougata Roy besides celebrities like actors Dipak Adhikari (Dev) and Tapas Paul.
Trinamool Yuva President Abhishek Banerjee, nephew of Chief Minister Mamata Banerjee, is also in the fray. On the rival side, CPI-M's Subhasini Ali is among the key candidates.
BJP nominee magician P C Sorcar (Junior) and WBPCC President Adhir Chowdhury, besides former West Bengal Finance Minister Asim Dasgupta of the CPI-M and former Union minister Tapan Sikdar of the BJP, pitted against each other in Dum Dum, are the key contestants in the last phase.
In Bihar, filmmaker Prakash Jha and former union minister Raghubansh Prasad Singh are among the 90 contestants.
During the course of the no-holds barred campaign, the Election Commission also came under attack from BJP and Samajwadi Party.
The EC was targeted by BJP over denial of permission for Modi's rally at the venue it wanted in Varanasi while it incurred the wrath of UP's ruling party in connection with the ban on Azam Khan from campaigning following his alleged hate speeches.
Modi's close aide Amit Shah, who is UP's BJP incharge, was also banned by EC from campaigning over an alleged hate speech. The ban was later lifted.