This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fluid, Electrolyte and Nutrition, Subject name: Surgery
[{'content': 'Which of the following is the most common complication of TPN? \nSelect and explain. \nA. Catheter related complications, B. Acidosis, C. Acalculous cholecystitis, D. Hypokalemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: - Most common complication of central venous catheterization (CVC): catheter related sepsis - Most dangerous complication following CVC: pneumothorax', 'role': 'assistant'}]