Kolkata, April 28 (ANI): A day after his rally in Kolkata, Narendra Modi faced flak on Monday from the TMC for attacking its chief Mamata Banerjee. The party has demanded him to apologize to their leader publicly or face a defamation case for questioning the sale of Mamata Banerjee's painting. The TMC also asked Modi to give account of UTI and Balco scam. Sarcastically lauding Mamata's talent of painting, Modi at a rally in Srirampore on Sunday said, "Your paintings used to be sold for Rs 4 lakh, 8 lakh or 15 lakh, but what is the reason that one of your paintings sold for Rs 1.80 crore. I respect art."But who was the person who bought the painting for Rs 1.80 crore”.