DMK today left it to the Government to decide whether or not to constitute a Joint Parliamentary Committee to probe the 2G spectrum allocation. Talking to the newsmen in New Delhi,DMK Parliamentary Party leader T R Baalu said the party would abide by the decision.His comments come in the wake of reports that there are differences among the UPA partners on constitution of a JPC to probe the 2G spectrum allocation.DMK MP A Raja had resigned as Telecom Minister on November 14 after the CAG report indicted him for causing a loss of Rs. 1.76 lakh crore to the exchequer.