This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Adson's test is positive in 
Select and explain. 
A. Cervical rib, B. Cervical fracture, C. Cervical spondylosis, D. Cervical dislocation
A: Cervical rib
Answer: A: Cervical rib 
Explanation: Adson's sign is the loss of the radial pulse in the arm by rotating head to the ipsilateral side with extended neck following deep inspiration . Ref : S. Das surgery 3/e p641