This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Concentration of sodium in mMol/L in low osmolar ORS is? 
Select and explain. 
A. 45, B. 90, C. 60, D. 75
D: 75
Answer: D: 75 
Explanation: None