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
One of the following ribs articulate directly with sternum except - 
Select and explain. 
A. 2nd rib., B. 5th rib, C. 4th rib, D. 8th rib
D: 8th rib
Answer: D: 8th rib 
Explanation: Ribs 1 to 7 articulate directly with sternum and are called true ribs.