D. Gross Domestic Production (GDP)
The total value of all final goods and services produced within a country in a particular year is called Gross Domestic Product (GDP).
Source: Comparing the Three Sectors, Chapter 2
The passage explicitly states: "It is the value of all final goods and services produced within a country during a particular year" — this is the definition of GDP. Note that option D says "Gross Domestic Production" which matches the concept; the standard term is Gross Domestic Product. Examiners accept D as the correct option here. Per Capita Income (A) is income per person; Gross National Income (C) includes income from abroad — both are different concepts.