This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
Which is not a true rib: 
Select and explain. 
A. 5th, B. 6th, C. 7th, D. 8th
D: 8th
Answer: D: 8th 
Explanation: Ans. D 8thRef: BDC, 6th ed. Vol 1 pg. 196-97* True ribs: Ribs directly articulating with sternum through costal cartilage. They are ribs 1 to 7* False ribs: Ribs that do NOT articulate directly with sternum. Ribs 8 to 12th.