<prompt> A 10 years old male with pain in left hip limping on examination restricted abduction internal rotation, probable diagnosis is -Septic arthritis of hipTuberculous arthritis of hipCongenital dislocation of hipPerthes disease  <response>: Amongst the given options restriction of abduction and internal rotation is seen only in Perthes disease.About other optionsIn TB hip :-i Stage of synovitis :- Restriction of adduction, internal rotation extension.ii Stage of arthritis :- Restriction of abduction, external rotation extension.Septic arthritis :- Restriction of adduction, internal rotation, extension in early stages.Congenital dislocation of hip :- Restriction of abduction, external rotation. 