This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Internal arcuate fibres of medulla comes from \nSelect and explain. \nA. Hypoglossal nucleus, B. Dorsal nucleus of vagus, C. Nucleus tractus solitarius, D. Nucleus gracilis and cuneatus', 'role': 'user'}, {'content': 'Answer: D \nExplanation: .', 'role': 'assistant'}]