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': 'Cells of parafollicular cells are derived from? \nSelect and explain. \nA. 1st branchial pouch, B. 2nd hrahchial pouch, C. 5th brachial pouch, D. 4th brachial pouch', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. 5th brachial pouch', 'role': 'assistant'}]