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': 'Nucleus ambiguous includes all, except \nSelect and explain. \nA. IX, B. X, C. XI, D. XII', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Nucleus ambiguous is located posterolateral to medulla at the level of olives.It gives origin to the motor fibres of 9,10,11 cranial nerves(Ref: Vishram Singh textbook of clinical neuroanatomy second edition pg-77)', 'role': 'assistant'}]