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': 'The Tonsils are derived from: \nSelect and explain. \nA. 1st branchial pouch, B. 2nd branchial pouch, C. 3rd branchial pouch, D. 4th branchial pouch', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 2nd branchial pouch', 'role': 'assistant'}]