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: Orthopaedics
[{'content': 'Gurd test detects \nSelect and explain. \nA. Fat globules in sputum, B. Fat globules in blood, C. Fat globules in bone-marrow, D. Fat globules in urine', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]