Explanation with reason
The full form of GDP is Gross Domestic Product.
If you look carefully the three words here , you will understand the meaning of term GDP by yourself.
Gross means profit earned
So, GDP means profit earned on Domestic product produced within the country within a year either by citizen of that country or non residents of that country.
So, Statement I and II are true.
I. goods produced within a country by citizens of that country
II. goods produced within a country by residents who are not citizens
Option C: I and II.