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: Surgery
Cervical rib arises from: 
Select and explain. 
A. C6, B. C7, C. C8, D. T
C: C8
Answer: C: C8 
Explanation: It is a Fibrous band arising from C7, which inserts on 1st thoracic rib.