The correct option is D Guwahati
The 2-day regional conference on Physical and Social Infrastructure for Regional Development was held in Guwahati, Assam on May 14, 2018. It was inaugurated by Prof. Jagdish Mukhi, the Governor of Assam. The Seminar is organized in collaboration with the Asian Infrastructure Investment Bank (AIIB), Research and Information System for Developing Countries (RIS) and the Federation of Indian Chamber of Commerce and Industries (FICCI). The conference provided an opportunity to do an in depth analysis of the core infrastructure related issues of the North Eastern States.