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
[{'content': 'While doing thoracocentesis, it is advisable to introduce needle along: \nSelect and explain. \nA. Upper border of the rib., B. Lower border of the rib, C. Lower border of the rib, D. In anterior pa of intercostal space.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Upper border of rib:', 'role': 'assistant'}]