This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardio thoracic surgery  , Subject name: Surgery
[{'content': 'Symptoms of thoracic outlet syndrome in cervical rib are produced due to compression of which nerve roots. \nSelect and explain. \nA. C5, C6, B. C6, C7, C. C7, C8, D. C8, T1', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cervical rib is usually represented by a fibrous band originating from the seventh cervical veebra and inseing onto the first thoracic rib. The lower trunk of the plexus (mainly T1) is compressed, leading to wasting of the interossei and altered sensation in the T1 distribution. Compression of the subclan aery may result in a post-stenotic dilatation with thrombus and embolus formation. Source : Bailet and Love 26th edition Pg : 872', 'role': 'assistant'}]