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
Which is not true about thoracic outlet syndrome ? 
Select and explain. 
A. Radial Nerve is commonly affected, B. Neurological features are most common, C. Resection of Pt rib relieves symptom, D. Positive Adson's test
A: Radial Nerve is commonly affected
Answer: A: Radial Nerve is commonly affected 
Explanation: Ans is 'a' ie Radial Nerve is commonly affected Not the Radial nerve, but Ulnar nerve is most commonly affected in thoracic outlet syndrome.