This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Joint disorders, Subject name: Orthopaedics
[{'content': "Severe disability in primary osteoahritis of hip is best managed by - \nSelect and explain. \nA. Ahrodesis, B. Ahroplasty, C. Mc Murray's osteotomy, D. Intra-aicular hydrocoisone and physiotherapy", 'role': 'user'}, {'content': 'Answer: B \nExplanation: IN SEVERE DISABILITY AHROPLASTY IS MODE OF MANAGEMENT REF : MAHESWARI 9TH ED', 'role': 'assistant'}]