This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection of Bones & Joints, Subject name: Orthopaedics
[{'content': 'Caries sicca is seen in - \nSelect and explain. \nA. Hip, B. Shoulder, C. Knee, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Shoulder o Shoulder joint tuberculosis, at times, may not produce any pus etc., and hence is called "caries sicca\' and should always be considered in differential diagnosis of much commoner shoulder problem - \'Frozen shoulder\'.', 'role': 'assistant'}]