Oil & Natural Gas Corpn Ltd has informed the Exchange that (1) M/s D V Joshi & Associates, Pune (2) M/s Shome & Banerjee, Kolkata (3) M/s Mani & Co., Kolkata (4) M/s K G Goyal & Associates, Jaipur (5) M/s N I Mehta & Co., Mumbai (6) M/s Ramanath Iyer & Co., Delhi (7) M/s M Krishnaswamy & Associates, Chennai have been appointed as the Cost Auditors of ONGC for the Financial Year 2009-10.