This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
Stapedius nerve is a branch of 
Select and explain. 
A. Trigeminal nerve, B. Facial nerve, C. Vagus nerve, D. None
B: Facial nerve
Answer: B: Facial nerve 
Explanation: The stapedius lies in a bony canal that is related to the posterior wall of the middle ear. Posteriorly and below, this canal is continuous with the veical pa of the canal for facial nerve. Anteriorly, the canal opens on the summit of the pyramid. Ref.BDC volume3,sixth edition pg 280