This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'A 4-year-old girl sustained an isolated, closed, diaphyseal fracture of her left femur in a motor vehicle accident. The fracture was transverse with approximately 1.5 cm of shoening. The most appropriate definitive management of this fracture is NOT RELATED-OHO \nSelect and explain. \nA. Skeletal traction, B. Immediate application of a hip spica cast, C. Skeletal traction for 2 weeks followed by application of a hip spica cast, D. External skeletal fixation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Isolated, closed femoral shaft fractures in children under 10 years of age are best managed by immediate closed reduction and application of a spica cast.', 'role': 'assistant'}]