16. The released IQAir 2021 World Air Quality Report 2021 which is the world's most polluted capital? A.Dushanbe, TajikistanB.Dhaka, BangladeshC.New Delhi, IndiaD.Muscat, Oman
Answer: Option C Explanation: New Delhi has been ranked the world's most polluted capital city for the second year in a row, according to IQAir's 2021 World Air Quality Report
