*$_Sodium tri poly phosphate (STPP) is chemically represented as?

• A. Na‚Äö√á√ñP3O‚Äö√á√Ö‚Äö√á√Ñ
• B. Na‚Äö√á√ëP3O‚Äö√á√
• C. Na‚Äö√á√âP4O‚Äö√á√ú
• D. Na‚Äö√á√áPO‚Äö√á√ë