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
[{'content': "All are seen in Thoracic outlet syndrome except ? \nSelect and explain. \nA. Mass in the Neck, B. Wasting of forearm muscles, C. Adson's test positive, D. Pallor", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Wasting of foream muscle", 'role': 'assistant'}]