Which of the following is not a concept in National Income Accounting?

The concept of "Domestic National Products (DNP)" is not a concept in National Income Accounting. In National Income Accounting, GDP (Gross Domestic Product), GNP (Gross National Product), and NDP (Net Domestic Product) are measures of a country's economic performance. GDP is the total value of goods and services produced within a country's borders, GNP includes the total value of goods and services produced by a country's citizens and businesses, regardless of their location, and NDP is the total value of goods and services produced within a country's borders minus depreciation. Therefore, the correct option is "Domestic National Products (DNP)".