This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pediatric Ohopedics, Subject name: Orthopaedics
[{'content': "In congenital dislocation of hip, clinical sign which shows that the affected thigh is at a lower level when the knees and hips are flexed to 90 degrees is known as: \nSelect and explain. \nA. Oolani's sign, B. Barlow's sign, C. Von Rosen's sign, D. Galeazzi's sign", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Galeazzi sign or Allis sign is done for Development Dysplasia of Hip in which on hip flexion and knee flexion the knee on affected side is at lower levels.', 'role': 'assistant'}]