In National Treasure, the Hollywood hit, Benjamin Gates (Nicolas Cage) follows his family legend of a treasure trove hidden by the founding fathers of the United States. Gates’s lifelong quest culminates in a hooting climax. Alas. Not all treasure hunts have box-office-friendly endings. Some leave you scratching your head. Take the one involving India’s national treasure, ONGC.Every year, the Maharatna company — the country's largest oil and gas