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
New WHO ORS osmolarity is 
Select and explain. 
A. 245, B. 270K. Park 22/e p203, C. 290, D. 310
A: 245
Answer: A: 245 
Explanation: None