National Income Calculation

National income is defined as the money value of final goods and services produced within the domestic territory of a country during a specific period. This is the standard definition in national accounting. Option (a) refers to Gross National Income (GNI) which includes income earned by nationals abroad. Option (b) is incomplete - it ignores government spending, exports, and other components of GDP. Option (c) is too narrow, as it excludes retained corporate earnings and includes transfer payments. Option (d) is the most accurate definition of National Income (NI) or Net National Product (NNP) - it encompasses the monetary value of all final goods and services produced domestically. > National income measures the total monetary value of final output produced within an economy in a given period, excluding intermediate goods and transfers. Answer: (d).