The correct answer is Indore Madhya Pradesh's Indore has been declared the cleanest city with a population more than 1 lakh in India in ‘Swachh Survekshan 2020' ranking listfollowed by Surat, Navi Mumbai and Vijayawada.
Patna is the dirtiest city in the same category.
The Union Ministry of Housing and Urban Affairs announce
Swachh Survekshan awards every year.
Swachh Survekshan monitors Swachh Bharat Abhiyan which was launched by Prime Minister Narendra Modi in 2014
Swachh Survekshan 2020 has been conducted in 4,242 cities, 62 cantonment boards and 92 Ganga towns in the country.
Swachh Survekshan awards 2020 conducted in an event Swachh Mahotsav in which a total of 129 awards are given in different categories.