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: Physiology
[{'content': 'In CSF, comparison to blood plasma are all except: \nSelect and explain. \nA. Low Ca ++, B. Low Na +, C. Low chloride, D. Low cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Low chloride', 'role': 'assistant'}]