The national income of India is calculated by

Planning commission
Central statistical organization (CSO)
Indian statistical institue
Finance commission

The correct answer is: B. Central Statistical Organization (CSO)

The Central Statistical Organization (CSO) is the nodal agency responsible for the collection, compilation, analysis and dissemination of official statistics in India. It was established in 1950 under the Ministry of Statistics and Programme Implementation.

The CSO is responsible for the compilation of national accounts statistics, which include estimates of gross domestic product (GDP), gross national product (GNP), and other economic aggregates. It also publishes a variety of other statistical series, including data on population, agriculture, industry, and trade.

The CSO is a member of the United Nations Statistical Commission and the International Statistical Institute. It is also a signatory to the Fundamental Principles of Official Statistics of the United Nations.

The other options are incorrect because:

  • The Planning Commission was a government body in India that was responsible for planning the country’s economic development. It was abolished in 2014.
  • The Indian Statistical Institute is a research institute that is headquartered in Kolkata. It is not responsible for compiling national accounts statistics.
  • The Finance Commission is a constitutional body that is responsible for recommending the distribution of central taxes among the states of India. It is not responsible for compiling national accounts statistics.