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: Medicine
All of the following are major complications of massive transfusion, except - 
Select and explain. 
A. Hypokalemia, B. Hypothermia, C. Hypomagnesemia, D. Hypocalcemia
A: Hypokalemia
Answer: A: Hypokalemia 
Explanation: Major complications in blood transfusion are fever,chills,tachycardia ,flushing ,rigor,uicaria,abdominal pain,shoeness of breath,anaphylactic shock,transmission of infection,air embolism ,thrombophlebitis,circulatory overload. Since very rapid hemolysis is a compliacation of transfusion ,hyperkalemia occurs.Reference:Davidson's principles & practice of medicine 22nd edition pg no 1016.