<prompt> What is the total osmolarity of low osmolarity ORS?311 mmol litre300 mmol litre245 mmol litre250 mmol litre  <response>: Composition of reduced osmolarity ORS: Components Amount in mmol litre Sodium 75 Chloride 65 Glucose, anhydrous 75 Potassium 20 Citrate 10 Total osmolarity 245 Ref: Park 21st edition, page 202. 