Explanation:

Indira Gandhi International (IGI) Airport ranked among the World’s top 20 busiest airports in the world in 2017. Delhi’s Indira Gandhi International (IGI) Airport has climbed six positions to enter the club of the top 20 airports across the world, the Airport Council International’s preliminary report on airport traffic for 2017 has stated. Hartsfield-Jackson Atlanta Airport in the United States with 104 million passengers secured the top spot, followed by Beijing at the second position and Dubai at the third. The ACI predicted that India will represent the third-largest aviation market in terms of passenger throughput after the US and China by 2020.