· Dadabhai Naoroji made the first attempt to compute India's National Income, but he did not divide the economy into primary and secondary sectors. Instead, he was primarily focused on estimating the national income using the concept of the Drain of Wealth in his book "Poverty and Un-British Rule in India". His estimates were more concerned with the economic exploitation by the British rather than classifying the economy into sectors.
· PC Mahalanobis made the first official attempt to compute National Income in India in the 1940s and played a significant role in the development of statistical methods in India.
· Dr VKRV Rao is credited with introducing the scientific method for calculating National Income in India, using statistical methods to estimate the national income and improving the accuracy of calculations.
Thus, the statement about Naoroji dividing the economy into the primary and secondary sectors is incorrect.