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
Sensory nerve fibres to posterior one third of the tongue is supplied by: 
Select and explain. 
A. XII cranial nerve, B. IX cranial nerve, C. X cranial nerve, D. VII cranial nerve
B: IX cranial nerve
Answer: B: IX cranial nerve 
Explanation: None