New Delhi: Airports of Delhi, Mumbai and Hyderabad are among the top five airports in the world providing international standard services. Airports Council International (ACI), a global body of airports, has adjudged Delhi's Indira Gandhi International (IGI) airport as second best after Seoul's Incheon airport in the category of airports handling 25-40 million passengers per annum (MPPA) for their service quality for the year 2012. Mumbai's Chhatrapati Shivaji International airport was adjudged the third best in this category, an ACI statement said. Hyderabad's Rajiv Gandhi International airport (RGI) has bagged the second position for their service quality in the category of five to 15 MPPA. Japan's Nagoya airport was adjudged the best in this category