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: Surgery
[{'content': 'Which of the following is known for Non union in children, if left untreated? \nSelect and explain. \nA. lntercondylar fracture of humerus, B. Fracture shaft of humerus, C. Fracture shaft of femur, D. Fracture distal 1/3rd of tibia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Fracture of shaft humerus', 'role': 'assistant'}]