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': 'Intralobar sequestration of lung is commonest in the ? \nSelect and explain. \nA. Apical segment of upper lobe, B. Medial segment of middle lobe, C. Lateral basal segmentof lower lobe, D. Posterior basal segment of lower lobe', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Posterior basal segment of lower lobe", 'role': 'assistant'}]