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: Biochemistry
[{'content': 'The normal range of serum osmolality (in mosm/L) is: \nSelect and explain. \nA. 280 to 295, B. 300 to 320, C. 350 to 375, D. 200 to 250', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]