Congress candidate Ronald Sapa Tlau(60) and his opponent L Ramkinlova (52), Mizo National Front candidate backed by United Democratic Front (UDF), filed their nominations today on the last date for filing nominations.
The name of Tlau was approved by the AICC president Sonia Gandhi yesterday from a list of nominees sent by the Pradesh Congress Committee.
UDF is an alliance of eight opposition parties in Mizoram formed before the Lok Sabha elections.
Only two UDF constituents, MNF and Mizoram People's Conference (MPC) have representatives in the 40-member state Assembly.
While the MNF has five legislators, the Mizoram People's Conference (MPC) has one member.
Congress enjoys a comfortable majority with 34 legislators in the state Assembly.
Election to the Rajya Sabha seat will be held on June 19 as the term of the incumbent MP Lalhmingliana, elected for two consecutive terms, will expire on June 18.