CBI Director A P Singh on Tuesday (February 15) contradicted Telecom Minister Kapil Sibal on his claim that the 2G spectrum allocation had caused zero loss to the national exchequer as he appeared before Parliament’s Public Accounts Committee (PAC). Singh was quizzed by the members of the Committee on various aspects of the 2G spectrum allocation which the CBI is investigating. "As far as he (Singh) has seen the case, to say 'zero loss' is wrong," PAC chairman Murli Manohar Joshi told a press conference after the meeting.