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
Level of the lower border of the lung at the mid-axillary line is - 
Select and explain. 
A. 6th rib, B. 8th rib, C. 10th rib, D. 12th rib
B: 8th rib
Answer: B: 8th rib 
Explanation: The inferior margin of pleura extends onto diaphragm at the level of (Costodiaphragmatic line)
-        8th rib in the midclavicular line
-        10th rib in mid-axillary line
-        12th rib at the lateral border of erector spinae.
The lower border of lungs extends till the level of
-        6th rib in the midclavicular line
-        8th rib in mid-axillary line
-        10th rib at the lateral border of erector spinae.