Besides activist Soni Sori, other candidates who formally entered into the poll arena on last day of filing nomination papers are BJP's Dinesh Kashyap, Congress's Deepak Karma, BSP's Manbodh Baghel, SP's Shankar Ram Thakur, and CPI's Vimla Sori.
The scrutiny for the nominations will be held on March 24 and names can be withdrawn on March 26, election officials said.
According to officials, in all 16 candidates have filed their nomination papers for Mahasamund, Rajnandgaon, Bastar and Kanker Lok Sabha seats.
The filing of nomination for these seats began on March 19.
In Mahasamund seat, former chief minister and Congress candidate Ajit Jogi and BSP contestant Kanhaiya Lal Sahau have filed in their nominations, besides three other contestants.
For Rajnandgaon seat, three candidates including Kamleshwar Verma of Congress and for Kanker seat, two candidates, including BSP's Ramsai Korram, have filed their papers.
Mahasamund, Rajnandgaon and Kanker seats will go to polls on April 17.
Out of 11 MPs the state sends to Lok Sabha, BJP had won 10 seats in 2009 elections and one seat was won by Congress.