The Institute for Management Development, in collaboration with Singapore University for Technology and Design (SUTD), has released the Smart City Index 2020.
The index has been topped by Singapore, followed by Helsinki and Zurich as top three smart cities.
Hyderabad was the top Indian city, placed at the 85th position(67th in 2019).
Other three Indian cities - New Delhi (86th from 68), Mumbai (93rd from 78) and Bengaluru (95th from 79) also witnessed a significant drop in their rankings.