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': 'True about vagal nuclei are all except- \nSelect and explain. \nA. There are 4 vagal nuclei, B. They are found in the floor of 4th ventricle, C. Nucleus Ambiguous is a vagal nucleus, D. Spinal trigeminal nucleus is not a vagal nucleus', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Spinal trigeminal nucleus is not a vagal nucleus * The vagus nerve includes axons which emerge from or converge onto four nuclei of the medulla. They are present deep in the medulla in the floor of the 4th ventricle.* These nuclei are:-1. The dorsal nucleus of vagus nerve -- which sends parasympathetic output to the viscera, especially the intestines2. The nucleus ambiguus -- which gives rise to the branchial efferent motor fibers of the vagus nerve and preganglionic parasympathetic neurons that innervate the heart3. The solitary nucleus -- which receives afferent taste information and primary afferents from visceral organs4. The spinal trigeminal nucleus -- which receives information about deep/crude touch, pain, and temperature of the outer ear, the dura of the posterior cranial fossa and the mucosa of the larynx", 'role': 'assistant'}]