Net National Product at factor cost (NNPFC) is defined as :

The correct answer is Option 2: The sum of the income earned by all factors in the production in the form of wages, profit, rent and interest etc. belonging to a country during a year. It includes net factor income from Abroad

NCERT: Net National Product at factor cost (NNP_FC) or National Income is defined as: The sum of the income earned by all factors in production in the form of wages, profit, rent, and interest, etc., belonging to a country during a year. It includes net factor income from abroad.