This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'Adson&;s test is positive in - \nSelect and explain. \nA. Cervical rib, B. Cervical spondylosis, C. Cervical fracture, D. Cervical dislocation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Adson&;s test is a provocative test for Thoracic Outlet Syndrome accompanied by compression of the Subclan aery by a cervical rib or tightened anterior and middle scalene muscles. Ref : Bailey and love surgery text book 27th Ed.', 'role': 'assistant'}]