Answer : 2. "Varanasi"
Explanation :

Prime Minister Narendra Modi inaugurated and laid the foundation stone of several beneficial projects in his parliamentary constituency Varanasi. In this series, PM Modi also inaugurated the world's largest meditation center Swarved Mahamandir. It is a 7-storey meditation center which is the largest in the world. The newly constructed Swaraveda Mahamandir is spread over 3 lakh square feet. In this centre, 20 thousand people can participate in yoga sessions simultaneously.