<prompt> True about concentration of Oral Rehydration Solution is: March 2007Sodium 70 mEq litPotassium 20 mEqlitBicarbonate 80 mEq litChloride 30 mEq lit  <response>: Ans. B: Potassium 20 mEqlit An ORS packet is dissolved in 1 L of water to produce a solution containing in mmol L Na 90, K 20, Cl 80, citrate 10, and glucose 111 standard WHO ORS or Na 75, K 20, Cl 65, citrate 10, and glucose 75 WHO reduced-osmolarity ORS. Composition of reduced osmolarity ORS is 2.6 g NaCI, 2.9 g trisodium citrate, 1.5 g KCL, and 13.5 g glucose. Decreasing the sodium concentration of ORS solution to 75 mOsm 1 improved the efficacy of the ORS regimen for children with acute non-cholera diarrhea. ORS is effective in patients with dehydration regardless of age, cause, or type of electrolyte imbalance hyponatremia, hypernatremia, or isonatremia as long as their kidneys are functioning adequately. After rehydration, this solution must be replaced by a lower-Na fluid to avoid hypernatremia. 