This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': "Bryce sign seen in \nSelect and explain. \nA. Laryngouell, B. Post cricoids carcinoma, C. Down's syndrome, D. Acute tonsillitis", 'role': 'user'}, {'content': 'Answer: A \nExplanation: On compression of sxternal swelling of laryngoule cause escape of air through larynk causing hissing of sound is know as Bryce sign.', 'role': 'assistant'}]