Option 1 -> Incorrect: We need to subtract, not add NFIA when converting from National to Domestic.
Option 2 -> Incorrect: We need to add depreciation (not subtract) and Net Indirect Taxes are not involved in this conversion.
Option 3 -> Add depreciation and subtract Net Factor Income From Abroad.
Option 4 -> Incorrect: We need to add depreciation, not subtract it.
Hence, Option 3: Add depreciation and subtract Net Factor Income From Abroad -> To convert from NNP_MP to GDP_MP, we need two adjustments: (1) Add Depreciation: 'Net' excludes depreciation while 'Gross' includes it, so we add back depreciation. (2) Subtract NFIA: 'National' includes Net Factor Income From Abroad while 'Domestic' excludes it, so we subtract NFIA. The formula is: GDP_MP = NNP_MP + Depreciation - NFIA. -> correct