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 right costo-phrenic recess extends up to the level of which rib in the mid-axillary line \nSelect and explain. \nA. 6th, B. 10th, C. 8th, D. 12th', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 10th', 'role': 'assistant'}]