if the factor income received from abroad is equal to factor income paid abroad then which of the following is not a valid statement ???
(a) NNPfc = NDPfc
(b) NDPfc + depreciation = GNPfc
(c) NDPfc + depreciation = GNPmp

Dear Student,
​​​​​​(c) NDPfc + depreciation = GNPmp is not valid statement because Factor income received from abroad is equal to factor income paid abroad which applies that Net factor income is zero which didn't affect the market and factor cost (i.e., factor cost = market price).

Regards