Explanation:

- Option 1: NNPMP (Net National Product at Market Prices) is calculated as GNPMP (Gross National Product at Market Prices) minus depreciation.

- Option 2: NNPMP can also be derived by adding Net Domestic Product at Market Prices (NDPMP) and Net Factor Income from abroad.

- Option 3: NNPMP is also calculated by adding Net National Product at Factor Cost (NNPFC) and Net Indirect Taxes.

- Option 4: "All of these" suggests that all the other options are valid ways to calculate NNPMP.

- Answer: Option 4 is indeed the correct answer as all are valid methods to derive NNPMP using different economic components.