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': 'A 10 years old male with pain in left hip & limping on examination restricted abduction & internal rotation, probable diagnosis is - \nSelect and explain. \nA. Septic arthritis of hip, B. Tuberculous arthritis of hip, C. Congenital dislocation of hip, D. Perthes disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Amongst the given options restriction of abduction and internal rotation is seen only in Perthes disease.\n\n\nAbout other options\n\nIn TB hip :-\n\ni) Stage of synovitis :- Restriction of adduction, internal rotation & extension.\nii)\xa0Stage of arthritis :- Restriction of abduction, external rotation & extension.\n\nSeptic arthritis :- Restriction of adduction, internal rotation, extension in early stages.\nCongenital dislocation of hip :- Restriction of abduction, external rotation.', 'role': 'assistant'}]