The Trinamool Congress today rebutted Congress leader P Chidambaram on his comment on "no concrete offer for an alliance" in Goa for the February-March election. "I met Mr Chidambaram in Delhi in December. I made a concrete offer to the Congress," Trinamool Congress leader Pavan Varma told NDTV. "I am dismayed, disappointed and also surprised at the manner in which Mr Chidambaram, a senior Congress leader who has been Finance Minister and Home Minister, is attempting to mislead people," he said.