The correct answer is Bhutan.
Bhutanese Prime Minister Lotay Tshering attended the recently organised river festival ‘Namami Brahmaputra’ in India. The festival was held in Guwahati, Assam, from December 3 to 5, 2022.
The festival was inaugurated by Indian Prime Minister Narendra Modi. Other dignitaries who attended the festival included Assam Chief Minister Himanta Biswa Sarma, Bhutanese Foreign Minister Lyonpo Tandi Dorji, and other ministers from both countries.
The festival was organized to celebrate the Brahmaputra River, which is a major river in both India and Bhutan. The river is a source of water for millions of people in both countries. It is also a major source of hydroelectric power.
The festival featured a variety of cultural events, including music, dance, and traditional food. There were also exhibitions on the history and culture of the Brahmaputra River.
The festival was a success and was well-received by the people of both India and Bhutan. It helped to promote cultural understanding and cooperation between the two countries.
Option A is incorrect because the Prime Minister of Bhutan is Lotay Tshering.
Option B is incorrect because the Prime Minister of China is Li Keqiang.
Option C is incorrect because the Prime Minister of Nepal is Sher Bahadur Deuba.
Option D is incorrect because the Prime Minister of Bangladesh is Sheikh Hasina.