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': 'Which of the following statement is true about Pinna except: \nSelect and explain. \nA. In Treacher-Collins syndrome malformed pinna may be present, B. Made up of elastic cailage, C. Develop from lst pharyngeal cleft only, D. Helps in localization of sound', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c. Develop from lst pharyngeal cleft onlyFirst branchial cleft is the precursor of external auditory canal.Around the sixth week of embryonic life, a series of six tubercles appear around the first branchial cleftBranchial clefts are ectodermal in origin.Pinna develops from 1st and 2nd pharyngeal arch', 'role': 'assistant'}]