The history of Nepal is general considered to have begun in 1768-69 B.S., when Prithivi Narayan Shah, the king of Gorkha, unified Nepal. The total area of Nepal at present is 147,181 Sq. Km. with a rectangular shape. It is about 192 Km. wide from North to South and 880 Km. long from East to West. Nepal is located between 26022' and 30027' north latitudes and 8004' and 88012' east longitudes and has four vegetation zones viz, tropical, deciduous, monsoon forest, subtropical mixed evergreen…