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
In mid clavicular plane, lower border of lung lies at level of: 
Select and explain. 
A. 4th rib, B. 6th rib, C. 8th rib, D. 10th rib
B: 6th rib
Answer: B: 6th rib 
Explanation: 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.