Under the Ministry of Finance, which Department is responsible for giving advice on economic issues having a bearing on internal and external aspects of economy including foreign exchange management ?

The Department of Economic Affairs (DEA), under the Ministry of Finance, is the nodal agency responsible for formulating and monitoring India's macroeconomic policies. Its mandate includes providing advice on economic issues with both internal and external implications, such as inflation, price stability, and foreign exchange management. It is also responsible for the preparation of the Union Budget and the Economic Survey.

• Department of Expenditure: Focuses on the public financial management system, overseeing the expenditure of the Central Government and the release of funds to states.
• DIPAM: Manages the government's investments in equity, including disinvestment in Central Public Sector Undertakings.
• Department of Financial Services: Oversees the functioning of banks, financial institutions, insurance companies, and the National Pension System.

Since the question specifically highlights economic advice and foreign exchange management, the DEA is the correct answer.