This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid and electrolytes, Subject name: Pediatrics
[{'content': 'Which of the following would be the plasma osmolality of child with plasma Na+ 125 MEq/L, glucose of 108mg/dl, and blood urea nitrogen (BUN) of 140 mg/dl \nSelect and explain. \nA. 360 mOsm/kg, B. 306 mOSM/kg, C. 312 mOSm/kg, D. 318 mOsm/kg', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Plasma osmolality measures the body&;s electrolyte-water balance. Whereas osmolality (with an "l") is defined as the number of osmoles (Osm) of solute per kilogram of solvent (osmol/kg or Osm/kg), osmolarity (with an "r") is defined as the number of osmoles of solute per liter (L) of solution (osmol/L or Osm/L). Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]