This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Pediatrics
[{'content': 'Most common location of congenital cyst in lung: \nSelect and explain. \nA. Right bronchus, B. Left bronchus, C. Pleural surface, D. Perihilar intrapulmonary', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. Right bronchus Ref: Nelson Textbook of Pediatrics 20th/ed p2057Explanation# Bronchogenic cysts arise from abnormal budding of the tracheal diverticulum of the foregut before the 16th week of gestation and are originally lined with ciliated epithelium.# They are more commonly found on the right and near a midline structure (trachea, esophagus, carina), but peripheral lower lobe and perihilar intrapulmonary cysts are not infrequent. Cysts are rarely demonstrable at birth.', 'role': 'assistant'}]