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': 'The sequestrated lobe of the lung is commonly supplied by- \nSelect and explain. \nA. Pulmonary artery, B. Intercostal artery, C. Descending aorta, D. Bronchial artery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Pulmonary sequestration\n\nPulmonary sequestration refers to the presence of a discrete mass of lung tissue without any normal connection to the airway system.\nBlood supply to the sequestered area arises not from the pulmonary arteries but from the aorta or its branches.\nSequestration may be of two types -\nExtralobar sequestration →\xa0Sequestrations are external to the lung and may be found anywhere in the thorax or mediastinum. Most commonly they are associated with other congenital anomalies.\nIntralobar sequestration → Found within the lung substance and are usually associated with recurrent localized infection or bronchiectasis.', 'role': 'assistant'}]