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
The right costo-phrenic line extends up to the level of which rib in the mid-axillary line - 
Select and explain. 
A. 6th, B. 10th, C. 8th, D. 12th
B: 10th
Answer: B: 10th 
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.