This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Tonsil is formed from \nSelect and explain. \nA. Ist Pharyngeal pouch, B. IInd Pharyngeal pouch, C. IIIrd Pharyngeal pouch, D. IV Pharyngeal pouch', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Second Pouch(a) The epithelium of the ventral pa of this pouch contributes to the formation of the tonsil.(b) The dorsal pa takes pa in the formation of the tubotympanic recess.Reference: Inderbir Singh Embryology; 10th edition; Page no: 135', 'role': 'assistant'}]