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': 'The lower border of the lung is upto which level of the rib at the mid-axillary line \nSelect and explain. \nA. 6, B. 8, C. 10, D. 12', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The lower border of lung crosses 6th rib in midclavicular line,8th rib in mid-axillary line 10th rib at the lateral border of erector spinae.', 'role': 'assistant'}]