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: Surgery
[{'content': 'Fiberoptic endoscopy is contraindicated in - \nSelect and explain. \nA. Children, B. Aneurysm of arch of aoa, C. Cervical spondylosis, D. Hemoptysis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Aneurysm of arch of aoa", 'role': 'assistant'}]