When measuring national income using the **Income Approach**, the focus is on summing up all the **incomes earned** by individuals and businesses in an economy for providing goods and services. This typically includes wages, profits, rents, and interest received. Let's examine each option:
- **Profit earned by NITEL plc**: This is included because it is part of the profits earned by businesses.
- **Profit earned by Nigerian Bottling Company plc**: This is included for the same reason as above; it is business profit, which is a component of national income.
- **Income earned by a bricklayer**: This is included because it's a wage or salary, which is a fundamental part of national income.
- **Allowance given to an aged mother by a civil servant**: This is **NOT included** in measuring national income through the income approach. The reason is that these are private transfer payments or personal transfers, not payments made for labor, production of goods, or capital services.