This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2019, Subject name: Anatomy
Post parotidectomy, patient feels numb while shaving. Which nerve was involved ? 
Select and explain. 
A. Facial, B. Mandibular, C. Auriculotemporal, D. Greater auricular
D: Greater auricular
Answer: D: Greater auricular 
Explanation: Greater auricular nerve - supplies sensory innervation for skin over parotid & mastoid process(both surfaces of outer ear) | when damaged after parotidectomy, | causes hyperesthesia / hypoesthesia