This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
The nucleus ambiguus is shared by all of the following cranial nerves except ( NOT RELATED TO PHARMACOLOGY) 
Select and explain. 
A. IX, B. X, C. XI, D. XII
D: XII
Answer: D: XII 
Explanation: None