This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
[{'content': 'The nucleus ambiguus is shared by all of the following cranial nerves except \nSelect and explain. \nA. IX, B. X, C. XI, D. XII', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cranial pa of nucleus ambiguus gives fibers to IX, X and the cranial root of XI nerve. The caudal pa of this nucleus gives fibers to the spinal root of XI nerveRef: Chaurasia; Volume 3; 6th edition; Page no: 342', 'role': 'assistant'}]