Correct Option
At the time the question was asked (1997), the Wholesale Price Index (WPI) was the primary measure of inflation in India. The WPI tracks the average change in prices of goods at the wholesale level. It was historically used as the headline inflation indicator for policy analysis and public reporting. However, it is important to note that since 2014, the Consumer Price Index (CPI) has been adopted as the official inflation target for monetary policy by the Reserve Bank of India, reflecting price changes at the retail consumer level.
Incorrect Options
The Consumer Price Index for urban non-manual workers (Option 2) and the Consumer Price Index for agricultural workers (Option 3) are specific indices designed to track price changes for particular demographic groups or sectors of the population. They do not represent the general or headline inflation rate for the entire economy.
National Income Deflation (Option 4), also known as the GDP Deflator, measures the overall price level of all goods and services produced in an economy. While it is a broad measure of inflation, it is not the primary index used for inflation targeting or general reporting in India, unlike the WPI or CPI.