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: Anatomy
[{'content': 'In mid clavicular plane, lower border of lung lies at level of: \nSelect and explain. \nA. 4th rib, B. 6th rib, C. 8th rib, D. 10th rib', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The lower border of the lung in midinspiration follows a curving line, which crosses the 6th rib in the midclavicular line and the 8th rib in the midaxillary line, and reaches the 10th rib adjacent to the veebral column posteriorly.', 'role': 'assistant'}]