I got this right because I thought of the cavernous sinus which has CN 3, CN4, CN V1 & V2. Out of all of all the options V2 is the only one that controls upper lip. For option C, pupillary reflex is controlled by CN 2 and 3, and if there is a fracture to the orbital floor the closest to the sinuses to be injured is CN5 (V2). Idk I could be wrong but if you guys agree let me know pls.
submitted by โjbrito718(48)
Damage to orbital floor can lead to impaired vertical gaze (ocular movement is restricted)via entrapped inferior rectus, numbness and paresthesia of the upper cheek/lip/gingiva, enophthalmos. UWORLD qid:11742, same concept