Correct Answer: Consumer Price Index (CPI)

Solution : The correct answer is (d) Consumer Price Index (CPI)

The Consumer Price Index (CPI) is a measure of inflation or changes in the average prices of a basket of consumer goods and services over time. It is used to track changes in the cost of living for consumers. It does not directly measure national income or the total value of goods and services produced in an economy.

GDP represents the total value of all final goods and services produced within a country's borders during a specific time period.

GNP represents the total value of all final goods and services produced by the residents of a country, whether they are located within the country or abroad.

NNP is derived from GNP by subtracting depreciation or the consumption of fixed capital from the GNP. It provides a measure of the net output or income earned by the residents of a country after accounting for capital depreciation.