This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroanatomy, Subject name: Anatomy
[{'content': 'Trigeminal nerve has how many nucleus? \nSelect and explain. \nA. 2, B. 3, C. 4, D. 5', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C.4Trigeminal nerve has four nuclei - 3 sensory and 1 motor nucleus.The sensory nucleus is divided into three parts, from rostral to caudal (top to bottom):a. The mesencephalic nucleusb. The chief sensory nucleus (or "main sensory nucleus" or "principal nucleus")c. The spinal nucleus', 'role': 'assistant'}]