The national income of a country for a given period is equal to the

1. National income aims to measure the total economic output of a country over a given period. 2. Option (1) describes Gross National Product (GNP), which is the total value of goods and services produced by the nationals of a country, regardless of location. 3. Option (2), the sum of total consumption and investment expenditure (C+I), represents components of aggregate demand or expenditure method, not the primary definition based on production value. 4. Option (3), the sum of personal income of all individuals, differs from national income due to factors like corporate taxes, undistributed profits, and transfer payments. 5. Option (4), the money value of final goods and services produced within the country (essentially GDP), is the most common starting point and definition for national income calculation based on the value of production. Among the given choices, it best represents the core concept.