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': 'Most common age group affected in thoracic outlet obstruction syndrome? \nSelect and explain. \nA. 10-25 years, B. 25-45 years, C. 45-65 years, D. > 65 years', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. 25-45 yearsIt constitutes compression of subclan vessels and/or brachial plexus between scalene muscles and first rib.Impoant causes are cemical rib and fibrous band from C, spinous process to first rib.Most common age group involved is 25-50 years females are more affected.', 'role': 'assistant'}]