This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteology of Thorax, Subject name: Anatomy
Attachment to First rib is all EXCEPT 
Select and explain. 
A. Scalenius-anterior, B. Scalenius posterior, C. Scalenius-medialus, D. Suprapleural membrane
B: Scalenius posterior
Answer: B: Scalenius posterior 
Explanation: Ans is 'b' i.e. Scalenus posterior Scalenus posterior is attached to the outer surface of the 2nd rib*.