This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharyngeal Arches, Subject name: Anatomy
[{'content': 'Which of the following is not derived from 1st pharyngeal pouch? \nSelect and explain. \nA. Middle ear, B. Eustachean tube, C. Tympanic membrane, D. Palatine tonsils', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D Palatine tonsilsRef: I.B. Singh, 9th ed. pg. 1118; Fundamental Anatomy By Walter Carl Hartwig, pg. 185* First pharyngeal pouch is located between 1st and 2nd pharyngeal arch* Palatine tonsil is a derivative of 2nd pharyngeal pouch* Eustachean tube, Middle ear, mastoid antrum and tympanic membrane is derived from 1st pharyngeal pouch.', 'role': 'assistant'}]