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: Physiology
Which of the following is true: September 2010 
Select and explain. 
A. ExtraCellular Fluid is rich in organic anion, B. ECF is more than Intra Cellular Fluid, C. High sodium to potassium ratio is seen in ECF, D. ECF is potassium ion rich
C: High sodium to potassium ratio is seen in ECF
Answer: C: High sodium to potassium ratio is seen in ECF 
Explanation: Ans. C: High sodium to potassium ratio is seen in ECFRemember:ICF is more abundant than ECFECF contains large amounts of sodium and chloride ionsICF contains large amount of potassium ions and phosphate ions