Pharmacology Other topics and Adverse effects 92a56b2c The concentration of sodium ions in the standard WHO oral rehydration solutions is: A 40m moles/L B 60 m moles/L C 90m moles/L D 110 m moles/L High-Yield Explanation (Ref: KDT 6/e p658, 659) Concentraton of Na+ is 90m mole/L in standard WHO-ORS whereas it is 75 m mole/L in New formula ORS