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': 'One of the following ribs articulate directly with sternum except - \nSelect and explain. \nA. 2nd rib., B. 5th rib, C. 4th rib, D. 8th rib', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ribs 1 to 7 articulate directly with sternum and are called true ribs.', 'role': 'assistant'}]