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: Anatomy
[{'content': 'Elastic cailage is absent in: March 2011, March 2013 \nSelect and explain. \nA. Epiglottis, B. Trachea, C. External auditory canal, D. Auricle of the ear', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Trachea Elastic cailage is present in the pinna, external auditory meatus, eustachian tubes, epiglottis, vocal process of arytenoids cailage', 'role': 'assistant'}]