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 lower border of lung at 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: B i.e. 8th rib