This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid & Electrolyte, Subject name: Pediatrics
[{'content': 'What is the amount of trisodium citrate dihydrate in WHO ORS? \nSelect and explain. \nA. 1.5 gm, B. 2.5 gm, C. 2.9 gm, D. 3.9 gm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. 2.9 gm. (Ref Paediatrics by OP Ghai 7th/pg. 263; KD Tripathi 5th ed. 618)NEW ORS BY WHOCONTENTAMOUNTGlucose13.5gmNaCI2.6 gmTrisodium citrate2.9 gmSoda bicarb-KCL1.5gmNa+75 mMolesK+20 mMolesCl-65 m MolesCitrate10 mmolesGlucose75 mMolesTotal Osmolality245 mosm/LCOMPARISON BETWEEN LOW OSMOLARITY ORS AND WHO-ORSIngredients of ORS solutionConcentration of various ingredients in ORS solution (mmol/L)Low osmolarity ORS (new)WHO-ORS (old)Sodium7590Potassium2020Chloride6580Citrate1010Glucose75111ReSoMal (Recommended ORS solution in severe malnutrition)ComponentsReSoMal (mMol/L)Standard ORSGlucose125111Sodium4590Potassium4020Chloride7080Citrate710Mg3-Zinc0.3-Copper0.045-Osmolarity300311', 'role': 'assistant'}]