Ludhiana, April 25 -- Aam Aadmi Party (AAP) candidate prof Tejpal Singh Gill organised a march (padyatra) in areas of North and East constituencies here on Wednesday and challenged sitting MP and Congress candidate Ravneet Singh Bittu for an open debate on the issues concerning the city. He flayed him for making 'fake' promises on tackling the problem of pollution of the Buddha Nullah....