This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Which of the about the composition of new ORS is wrong? 
Select and explain. 
A. NaCl-2.6 grams\/litre, B. KCI - 1.5grams \/litre, C. Glucose - 13.5 grams\/litre, D. Total osmolarity - 300 mmol\/1
D: Total osmolarity - 300 mmol\/1
Answer: D: Total osmolarity - 300 mmol\/1 
Explanation: Total osmolarity is 245 mmol/litre. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:224. <\p>