Physics · Human Physiology & Biochemistry - ORS Mechanism

With reference to Oral Rehydration Salts (ORS) and glucose absorption, consider the following statements: I. The physiological basis of WHO-ORS relies on the coupled sodium-glucose co-transport mechanism in the intestinal mucosa, which remains intact during acute diarrhoea. II. In the standard WHO formulation, glucose functions solely as an energy substrate and has no role in active sodium absorption. III. In the human body, excess glucose is stored primarily in the liver and muscles as glycogen. IV. Excess sugar in an ORS mixture increases lumen osmolarity, which can draw water out of tissues and worsen dehydration. Which of the statements given above are correct?