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: Radiology
[{'content': 'The most likley diagnosis in a newbron who had a radiopaque shadow with an air fluid level in the chest along with hemiveebrae of the 6th thoracic veebra on plain X-ray is: \nSelect and explain. \nA. Congenital diaphragmatic hernia, B. Oesophageal duplication cyst, C. Bronchogenic cyst, D. Staphylococcal pneumonia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Oesophageal duplication cyst', 'role': 'assistant'}]