this is almost a phiolosophical question - bases of national unity are very broad - common language, religion, culture, geographic proximity, and many others are the bases of national unity
the national game (sport) of Nepal is dandi biyo.
There isn't any national fruit in Nepal.
Nepal National Library was created in 1957.
National Assembly of Nepal ended in 2007.
National Assembly of Nepal was created in 1990.
National Museum of Nepal was created in 1928.
national unity brings progress in a nation
Nepal National Teachers Association was created in 1979.
Nepal does not have any official national game.
Russian National Unity was created in 1990.
Union of National Unity was created in 1833.
National Unity of Hope was created in 2002.