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
Glucose: sodium ratio in ORS is - 
Select and explain. 
A. 1:01, B. 3:01, C. 7:01, D. 10:01
A: 1:01
Answer: A: 1:01 
Explanation: Ans. is 'a' i.e., 1:1 * An appropriate rehydration solution has the correct balance of glucose and sodium, which enables the body to absorb the water passively via the sodium glucose co-transport mechanism in the small intestine.* The glucose - to - sodium ration is an important determinant in the acceptability of these solutions.* Optimal solutions have a 1:1 or a 2:1 glucose: sodium ratio.* When additional sweetener is added to the rehydration solution, the ratio of glucose to sodium is distorted and may result in osmotic diarrhea or inappropriate absorption of electrolytes.