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': 'Thymus glands are derived from: \nSelect and explain. \nA. I pharyngeal pouch, B. II pharyngeal pouch, C. III pharyngeal pouch, D. IV pharyngeal pouch', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]