The correct answer is: B. Consumers Price Index for urban non-manual workers
The Consumers Price Index (CPI) is a measure of the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services. The CPI is used to track inflation and to adjust wages, salaries, and pensions.
The CPI for urban non-manual workers is the most widely used measure of inflation in India. It is compiled by the Ministry of Labour and Employment and is based on a survey of prices of goods and services purchased by urban households.
The CPI for agricultural workers is a measure of the average change over time in the prices paid by agricultural households for a market basket of consumer goods and services. The CPI for agricultural workers is compiled by the Ministry of Agriculture and Farmers Welfare and is based on a survey of prices of goods and services purchased by agricultural households.
The Wholesale Price Index (WPI) is a measure of the average change over time in the prices received by domestic producers for their output. The WPI is compiled by the Ministry of Commerce and Industry and is based on a survey of prices of goods and services sold by domestic producers.
The National Income Deflation is a measure of the rate of decrease in the prices of goods and services produced in the economy. The National Income Deflation is calculated by the Central Statistical Organisation and is based on a survey of prices of goods and services produced in the economy.
In conclusion, the correct answer is: B. Consumers Price Index for urban non-manual workers.