This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Exposure of left subclan aery by supraclavicular approach does not require cutting of 
Select and explain. 
A. Sternocleidomastoid, B. Scalenus anterior, C. Scalenus medius, D. Omohyoid
C: Scalenus medius
Answer: C: Scalenus medius 
Explanation: Scalenus medius is located posterior to the subclan aery. Hence there is no need to cut this to expose the subclan aery. Ref - Bdc 6th e Vol 3 pg165,166 , pubmed.com