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': 'which of the following statements is true regarding retro sternal goitres ? \nSelect and explain. \nA. sternal incision is always required, B. Majority of the goitres derive their blood, C. Majority of the retro sternal goitre can be removed by a neck incision, D. Operated only if patient is symptomatic', 'role': 'user'}, {'content': 'Answer: C \nExplanation: majority of the restrosternal goitres as are secondary goitres which can be removed a neck cervical incision ref : bailey and love 27th ed', 'role': 'assistant'}]