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
Attachment to the first rib is all except - 
Select and explain. 
A. Scalenus anterior, B. Scalenus posterior, C. Scalenus medius, D. Suprapleural membrane
B: Scalenus posterior
Answer: B: Scalenus posterior 
Explanation: Scalenus posterior is attached to the second rib.