Detailed Solution:
The correct answer is “Gurugram”.
The Secretariat of the International Solar Alliance (ISA) is located in Gurugram, India.
The ISA was jointly launched by the Prime Minister of India, Narendra Modi, and the President of France, Francois Hollande, in 2015 at the United Nations Climate Change Conference in Paris.
The ISA is an intergovernmental organization that aims to promote solar energy and reduce the cost of technology and financing for solar energy projects in its member countries.