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: Pediatrics
[{'content': 'Child with frog like position and resistance to move the limbs - \nSelect and explain. \nA. Scurvy, B. Rickets, C. Trauma, D. Congenital dislocations', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Congenital dislocations', 'role': 'assistant'}]