Which of the following is NOT a correct statement in the context of National income?

net domestic product at factor cost is estimated by adding net value added at factor cost of all the producing units of an economy

sum of gross value added at factor cost of all producing units gives us gross domestic product at factor cost;

sum of gross value added at market price of all producing units gives us gross domestic product at market price

net factor income from abroad has to be added to gross domestic product at market price for getting the national income