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 regarding thoracic inlet syndrome - 
Select and explain. 
A. Most commonly radial nerve, B. Resection of 1st rib is effective t/t, C. Physiotherapy and position exercises relieves symptom, D. Neurological signs and symptoms are common.
A: Most commonly radial nerve
Answer: A: Most commonly radial nerve 
Explanation: None