Solution:Marshall - Lerner condition states that a devaluation or depreciation of a currency will help reduce a current account deficit, if the sum of the price elasticity of demand (PED) for exports and imports is greater than 1 (price elastic).
Note:-
1) If the sum of the elasticity of demand for exports and imports is greater than 1 then devaluation will improve BOP.
2) If the sum of the elasticity of demand for export and import is less than one devaluation will worsen the BOP.
3) If the sum of the elasticity of demand for export and import is equals to one then the devaluation will not change in BОР.
II. Currency devaluation will often trigger the large scalelegal capital flight, and foreign investors run away from such countries before their assets lose too much its value.