The Reserve Bank of India (RBI) measures inflation primarily using the Consumer Price Index (CPI). The CPI is a comprehensive index representing the changes in the price level of a basket of consumer goods and services purchased by households. It provides an aggregate measure of a country's inflation rate. Here's why the CPI is used:
- Representative Basket: CPI reflects the cost of living by considering a wide range of items that a typical household might purchase.
- Consumer Focus: This index focuses on the price changes from the consumer's perspective, which is crucial for understanding the impact of inflation on the common populace.
- Policy Relevance: By tracking CPI, the RBI can implement monetary policies that stabilize the economy by controlling inflation, thus ensuring consumer welfare.
Therefore, among the given options, the correct answer is:
Consumer Price Index