Which department is responsible for overseeing economic affairs in India?

The Department of Economic Affairs is the correct choice as it is specifically tasked with overseeing economic affairs in India. This department operates under the Ministry of Finance and plays a crucial role in formulating and implementing economic policies, including monitoring the overall economic situation, managing fiscal and monetary policies, and coordinating international economic relations. It is responsible for key areas such as the management of public debt, economic forecasting, and statistical analysis of various economic indicators.

Other departments listed, such as the Department of Financial Services, focus primarily on the financial sector and banking, while the Department of Public Enterprises concentrates on the performance and management of public sector enterprises. The Department of Expenditure deals with matters related to government expenditure and financial administration. Each of these departments has distinct responsibilities and focuses different aspects of the economy but does not encompass the overall supervision of economic affairs like the Department of Economic Affairs does.