Where does the National Fertilizer Corporation (NFC) produce all Single Super Phosphate (SSP) and some Nitrophos fertilizers locally?

Explanation

The National Fertilizer Corporation (NFC) manufactures Single Super Phosphate (SSP) and certain Nitrophos fertilizers at multiple sites, including Faisalabad, Jaranwala, and Haripur, making 'All of the above locations' the correct answer.