This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Facial Nerve and its disorders, Subject name: ENT
[{'content': 'Which of the following is not true about facial nerve & its relations \nSelect and explain. \nA. Processus cochleariformis acts as a landmark for geniculate ganglion of facial nerve, B. Tympanic segment of facial nerve lies below round window & above horizontal semi circular canal, C. Mastoid segment of facial nerve lies always behind tympanomastoid suture, D. A patient with lesion between geniculate ganglion & nerve to stapedius will have phonophobia & loss of stapedial reflex & taste sensation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tympanic segment of facial nerve lies Above oval window & Below Horizontal SCC FOR MIDDLE EAR AND MASTOID SURGERY Processus cochleariformis- It demarcates geniculate ganglion which lies just anterior to it. Tympanic segment of the nerve stas at this level. Oval window and horizontal canal- Facial nerve runs above oval window (stapes) and below the horizontal canal. Sho process of incus- Nerve lies medial to sho process of incus at level of aditus. Pyramid-Nerve runs behind the pyramid and the posterior tympanic sulcus. Tympanomastoid suture- In veical/mastoid segment, nerve runs behind this suture. Digastric ridge- Nerve leaves the mastoid at the anterior end of digastric ridge.', 'role': 'assistant'}]