The correct answer is: "Real Gross Domestic Product (GDP) is inflation-adjusted for price changes".
Nominal GDP is usually calculated as the macroeconomic indicator which measures the total amount of goods and services produced in an economy during a specific period of time. Such manufactures are measured in monetary terms. When economic growth is studied using nominal GDP figures, conclusions can be confusing. Although calcultions show there has been growth, it can be wrongly attributed to increases in production and it can be caused by price variations instead.
This is why the Real GDP is calculated, to exclude the effect of inflation so that it is possible to study economic growth trends. A base year is used. Real GDP figures are computed by using the quantities produced on the year of interest but the prices of the base year. Therefore, changes experienced by the Real GDP figure can be only attributed to quantity variations.