This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Nucleus in brain common to IX, X and XI cranial nerves: 
Select and explain. 
A. Nucleus solitarius, B. Nucleus ambiguus, C. Dentate nucleus, D. Red nucleus
B: Nucleus ambiguus
Answer: B: Nucleus ambiguus 
Explanation: The nucleus ambiguus is a group of large motor neurons, situated deep in the medullary reticular formation. The nucleus ambiguus contains the cell bodies of nerves that innervate the muscles of the soft palate, pharynx, and larynx which are strongly associated with speech and swallowing.
Nucleus in brain common to IX, X and XI cranial nerves is  nucleus ambiguous.