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
Posterior belly of digastric is supplied by - 
Select and explain. 
A. Facial nerve, B. Mandibular nerve, C. Spinal accessory nerve, D. Ansa cervicalis
A: Facial nerve
Answer: A: Facial nerve 
Explanation: None