Correct Answer : Option (C) - Mumbai
Note : As per Mercer's 25th Annual Cost of Living Survey which was conducted in March 2019, Mumbai was considered as India's most expensive city. It was included in the list of top 20 most-expensive cities in Asia for expatriates as its residential housing prices were the highest in the world. Indian Cities: Mumbai fell 12 spots and was ranked 67th position. New Delhi stood at 118th place, Chennai was ranked 154th position, Bengaluru at 179th position and Kolkata at 189th place.