This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hip, Spine, Neck, and Shoulder Problems, Subject name: Orthopaedics
[{'content': "Which of the following movements is restricted in Perthe's disease - \nSelect and explain. \nA. Adduction & external rotation, B. Abduction & external rotation, C. Adduction & internal rotation, D. Abduction & internal rotation", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Abduction & internal rotationClinical features of Perthes diseaseo Perthes disease is common in male of age group 5-10 years.o Pain in the hip, often radiating to knee,o Limp (antalgic limp)o Limitation of movement:-Abduction, internal rotation and extension are limited, therefore there is adduction, external rotation, and flexion deformity,o Shortening of limb.o Positive trendelenburg test.o During the disease process, bone age is 1-3 years lower than the normal. After healing, bone age returns to normal.", 'role': 'assistant'}]