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
While doing thoracocentesis, it is advisable to introduce needle along: 
Select and explain. 
A. Upper border of the rib., B. Lower border of the rib, C. Lower border of the rib, D. In anterior pa of intercostal space.
A: Upper border of the rib.
Answer: A: Upper border of the rib. 
Explanation: A i.e. Upper border of rib: