The AAP Monday announced it was fielding Bollywood actor Jaaved Jaaferi against BJP president Rajnath Singh from Lucknow Lok Sabha constituency as it released a list of 22 candidates.The Aam Aadmi Party (AAP) has put up Thamil Arima against union Finance Minister P.Chidambaram's son Karti P. Chidambaram, who is contesting in place of his father from Tamil Nadu's Sivganga constituency.Sanjeet Dhanka has been fielded from Rajasthan's Dausa, presently represented by union minister Namo Narain Meena.The party have announced four more candidates from Tamil Nadu, three from Jharkhand and Gujarat, seven from Bihar and one candidate from Chhattisgarh and Himachal Pradesh each.Over 400 candidates have been announced by the AAP so far.