This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Larynx, Subject name: ENT
[{'content': 'The best way to diagnose laryngomalacia is: \nSelect and explain. \nA. Symptoms and signs of disease only, B. Soft tissue lateral view neck, C. Direct laryngoscopy under general anaesthesia, D. Flexible fibreoptic laryngoscopy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Laryngomalaeia is a congenital disorder characterised by flaccidity of supraglottic larynx which gets sucked in during inspiration producing stridor. Flexible fibreoptic laryngoscopy is the best way to study the dynamics of supraglottis in an awake patient. Direct laryngoscopy may miss the diagnosis as supraglottis is put on stretch by the laryngoscope unless its tip is placed only in the vallecula. Other synchronous congenital lesions of larynx, e.g. glottic cysts, laryngeal paralysis or laryngeal web may also be diagnosed.', 'role': 'assistant'}]