From the following, which will be included in the National Income?

Expenditure on adding a floor to the building.

The correct answer is Option (3) → Expenditure on adding a floor to the building.

• Social security contributions by employees – These are transfer payments and not a part of factor income, so they are not included in National Income.

• Expenditure on procuring building materials for maintenance – This is considered intermediate consumption, not final expenditure, so it is not included in National Income.

• Expenditure on adding a floor to the building – This is a form of capital formation (investment in fixed assets), which is part of Gross Domestic Capital Formation, and hence included in National Income.

• Payment of interest on a loan taken by an employee from the employer – This is a personal financial transaction and not a production-related factor income, so it is not included in National Income.