NEW DELHI - June 6, A plea was today filed in a Delhi court to seek its nod to examine Prime Minister Manmohan Singh and Congress President Sonia Gandhi as witnesses in a private complaint case filed against Union Home Minister Sushilkumar Shinde for his alleged "Hindu terror" remarks made at Jaipur.  Taking up the application, Metropolitan Magistrate Harun Pratap asked complainant Vivek Garg, a RTI activist, to explain why was it relevant to summon the Prime Minister and Gandhi as witnesses.