15. Which Indian cities have been recognised as the '2021 Tree City of the World' by FAO? A.Indore and HyderabadB.Mumbai and IndoreC.Kolkata and MumbaiD.Mumbai and Hyderabad
Explanation: The United Nations Food and Agriculture Organisation (FAO) and Arbor Day Foundation have jointly recognised Mumbai and Hyderabad as '2021 Tree City of the World'.
