The Samajwadi Party announced the candidature of Tej Bahadur Yadav, a resident of Harayana's Rewari, who was dismissed from service after he complained about poor quality of food served to the personnel.
Tej Bahadur Yadav told IANS: "Today I filed the nomination papers from Varanasi as Samajwadi Party candidate."
He said that the fight in the Varanasi is now between "a real watchman and a fake watchman".
"Earlier the party has fielded Shalini Yadav but then Akhileshji (SP chief Akhilesh Yadav) gave a thought about whom to field against the fake chowkidaar (watchman).
"The people now have to choose between a real watchman and a fake watchman. Even Akhileshji said that we are standing with the real watchman and not with a person who only believes in rhethoric," the ex-Border Security Force (BSF) trooper said.
He said that the Aam Aadmi Party will support his candidature in the Lok Sabha polls.
Tej Bahadur Yadav had earlier announced that he will contest as an independent candidate from Varanasi.
The BSF constable was dismissed in 2017 after he posted a video on Facebook complaining about the poor quality of food provided to the security personnel.
Attacking the Modi government, he said: "I was dismissed because I spoke the truth. The parliamentary committee, with Murli Manohar Joshi as its member, submitted the report in Parliament in my favour. Despite that, I was dismissed."
Varanasi goes to polls on May 19 in the final phase of the seven-stage general elections.
Participating in the discussion on The Muslim Women (Protection of Rights on Marriage) Bill, 2019, Azam Khan made a remark directed at the presiding officer, which drew objections from the treasury benches, who demanded an apology from the Rampur MP.
Objecting to the remark, Rama Devi, the MP from Bihar's Sheohar, chided him, saying that was not the way to speak and ordered the remarks be expunged.
In response, Azam Khan said: "You are much respected. You are like my sister."
Meanwhile, Speaker Om Birla came on to the chair and said such kind of unparliamentary words should not be used.
Azam Khan reiterated that Rama Devi was like his sister and he is ready to resign from the house if he used any unparliamentary word against her.
Coming to his support, SP chief Akhilesh Yadav said: "I don't think Azam Khanji meant any disrespect to the chair (Rama Devi). These (BJP MPs) people are so rude. Who are they to raise fingers?
"If you (Speaker) think that the words use by Khan are unparliamentary, they should be expunged."
Birla then said: "It is easy for all of you to demand 'expunge this expunge that', but why should the need to expunge arise at all? Once a remark is given, it is already in public domain. Therefore, we all should speak keeping the dignity of Parliament in mind."
After the uproar, Khan walked out of the Lok Sabha and was joined by other SP members.