Kumar, a five-time MP, filed his nomination for Bangalore South constituency, where he is being challenged by former Infosys co-founder and face of "Aadhar" programme, Nandan Nilekani on Congress ticket.
Muniyappa is seeking re-election from Kolar (Reserved) constituency.
Former minister Krishnappa, accompanied by former Prime Minister and JDS supremo H D Deve Gowda, submitted his nomination papers for the Tumkur Lok Sabha seat.
Speaking to reporters, Ananth Kumar said Nilekani would lose the election as the electorate in Bangalore South is very scrutinising. He said the BJP would win at least 20 of the 28 Lok Sabha seats from Karnataka, riding high on the Narendra Modi wave throughout the country.
The BJP has held this constituency since 1991 with Kumar winning since 1996.
The last date for filing nominations is March 26.Scrutiny of papers will be taken up the next day. March 29 is the last date for withdrawal of nominations.
