This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Joint disorders, Subject name: Orthopaedics
[{'content': 'In cervical spondylosis, the disc space narrowing is most often evident on x-ray at \nSelect and explain. \nA. C3-C4, B. C4-C5, C. C5-C6, D. C6-C7', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cervical spondylosis is a degenerative condition of the cervical spineDegeneration of disc results in the reduction of disc space and peripheral osteophyte formation. The posterior interveebral joints get secondarily involved and generate pain in the neck. The osteophytes impinging on the nerve roots give rise to radicular pain in the upper limb.Cervical spondylosis occurs most commonly in the lowest three cervical interveebral joints (the commonest is at C5-C6).Maheswari 5th edition PG 297', 'role': 'assistant'}]