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: Surgery
[{'content': 'Hyponatremia in multiple myeloma is - \nSelect and explain. \nA. TRUE, B. Relative, C. Absolute, D. Pseudo', 'role': 'user'}, {'content': 'Answer: D \nExplanation: • Patients with multiple myeloma also have a decreased anion gap  because the M component is cationic, resulting in retention of chloride.\n• This is often accompanied by hyponatremia that is felt to be artificial (Pseudohyponatremia) because each volume of serum has less water as a result of the increased protein.', 'role': 'assistant'}]