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: Surgery
Frey's Syndrome is due to injury of which of the following nerve branch 
Select and explain. 
A. Facial Nerve, B. Trigeminal nerve, C. Glossopharyngeal nerve, D. Vagus nerve
B: Trigeminal nerve
Answer: B: Trigeminal nerve 
Explanation: * Auriculo temporal nerve is the Post ganglionic parasympathetic nerve which on injury during parotidectomy, results in Gustatory sweating syndrome known as Frey's syndrome after 2-3 months. * Auriculotemporal nerve is the branch of Mandibular division of Trigeminal Nerve( 5th Cranial Nerve) Ref:- Surgery Sixer 3rd Edition; Pg num:- 191