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: Dental
[{'content': 'pH of synovial fluid is: \nSelect and explain. \nA. Basic in resting., B. Acidic on movement., C. Neutral., D. Both A& B', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]