<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 72-year-old man comes to his primary care provider because of double vision and headache. He says these symptoms developed suddenly last night and have not improved. He has had type 2 diabetes mellitus for 32 years and essential hypertension for 19 years for which he takes metformin and lisinopril. His last recorded A1c was 9.4. He has smoked 10 to 15 cigarettes a day for the past 35 years. Family history is significant for chronic kidney disease in his mother. Vital signs reveal a temperature of 36.9 C 98.42F, blood pressure of 13782 mm Hg, and pulse of 72min. On examination, there is ptosis of the right eye and it is deviated down and out. Visual acuity is not affected in either eye. Which of the following cranial nerves is most likely impaired in this patient?? A: Trochlear nerve, B: Oculomotor nerve, C: Abducens nerve, D: Optic nerve, E: Facial nerve,  <response>: This is a clinical vignette describing a 72-year-old man with longstanding diabetes and hypertension who presents with sudden onset double vision and headache. The key finding on exam is ptosis of the right eye and deviation down and out, indicating dysfunction of extraocular muscles on the right side. Based on the presentation, this is most likely a cranial nerve palsy. The oculomotor nerve controls most of the extraocular muscles, including the levator palpebrae superioris which elevates the eyelid. Ptosis and deviation of the eye down and out indicates impairment of the oculomotor nerve.The choices describe different cranial nerves. The trochlear and abducens nerves control extraocular muscles but would not cause ptosis. The optic and facial nerves do not control extraocular muscles.B: Oculomotor nerve 