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: Pathology
[{'content': 'Bronchogenic cysts occur commonly in- \nSelect and explain. \nA. Posterior mediastinum, B. Superior mediastinum, C. Carina, D. Periphery of lung.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Bronchogenic cysts \n\nBronchogenic cyst is a congenital lung defect, which develops from abnormal lung budding of primitive foregut.\nMost of the bronchogenic cyst arises in the mediastinum, where they are usually located in the mid mediastinum near carina. \nAbout 15% of Bronchogenic cyst also occurs in pulmonary parenchyma.\nWhen located in the lung they are more common in right lung and lower lobe.\nThey are lined by cuboidal or ciliated columnar epithelial cells and are usually filled with mucoid material.', 'role': 'assistant'}]