The colonial government never made any sincere attempt to estimate India's National and per capita income. However some individual attempts were made to measure such incomes. Which among those individual attempts of estimates of national income and per capita income was considered very significant?

The correct answer to this open question is the following.

Among those individual attempts of estimates of national income and per capita income that were considered very significant to estimate India's National and per capita income in the colonial government, are the following.

Those important individual attempts belong to people like William Digby, Findlay Shirras, Dadabhai Naoroji, R.C. Desai, and VKVR Rao. From the British perspective, there was no real interest in the measurement of this economic indicator because what was important for the British government was to fulfill its economic and political interests such as the exploitation of natural resources and raw materials that were sent to England to be transformed in the fabrics and industries of London. The development or growth of India was never a goal.