This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Anatomy
Freezing point of normal human plasma is 
Select and explain. 
A. 4degC, B. 0degC, C. _0.54degC, D. _1.54degC
C: _0.54degC
Answer: C: _0.54degC 
Explanation: The freezing point of normal human plasma averages _0.54degC which corresponds to osmolar concentration in plasma of 290 mOsm/L The term tonicity is used to describe the osmolality of a solution relative to plasma A 0.9% saline solution and 4% glucose solution is isotonic when initially infused intravenously osmolarity= 2(Na+)(mEq/L)+0.055(glucose)(mg/dL)+0.36(BUN)(mg/dL) Red Robbins 9/e p420 and ananthanaraya