This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surgical Approaches to the Thyroid, Subject name: Surgery
Which of the following is not a landmark of facial nerve during superficial parotidectomy? 
Select and explain. 
A. Tragus, B. Mastoid process, C. Posterior belly of digastric muscle, D. Zygomatic bone
D: Zygomatic bone
Answer: D: Zygomatic bone 
Explanation: Ans. (d) Zygomatic bone* Surgical landmarks to the facial nerve include the tympanomastoid suture line, the tragal pointer, and the posterior belly of the digastric muscle.* The tympanomastoid suture line lies between the mastoid and tympanic segments of the temporal bone and is approximately 6-8 mm lateral to the stylomastoid foramen. The main trunk of the nerve can also be found midway between (10 mm posteroinferior to) the cartilaginous tragal pointer of the external auditory canal and the posterior belly of the digastric muscle.