<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 65-year-old man presents to the emergency department because of a sudden loss of vision in his left eye for 2 hours. He has no pain. He had a similar episode 1 month ago which lasted only seconds. He has no history of a headache or musculoskeletal pain. He has had ischemic heart disease for 8 years and hypertension and diabetes mellitus for 13 years. His medications include metoprolol, aspirin, insulin, lisinopril, and atorvastatin. He has smoked 1 pack of cigarettes for 39 years. The vital signs include: blood pressure 14598 mm Hg, pulse 86min, respirations 16min, and temperature 36.7C 98.1F. Physical examination of the left eye shows a loss of light perception. After illumination of the right eye and conceptual constriction of the pupils, illumination of the left eye shows pupillary dilation. A fundoscopy image is shown. Which of the following best explains these findings?? A: Central retinal artery occlusion, B: Demyelinating optic neuritis, C: Retinal detachment, D: Temporal arteritis, E: Wet macular degeneration,  <response>: This is a question about a patient with sudden vision loss in one eye. Based on the description, the key findings are:- 65 year old male with sudden unilateral vision loss - History of ischemic heart disease, hypertension, diabetes- Pupillary dilation in the affected left eye after swinging flashlight test- Fundus image showing retinal whitening consistent with retinal infarctionThe swinging flashlight test showing a relative afferent pupillary defect RAPD in the left eye indicates optic nerve damage on that side. The fundus findings of retinal whitening match central retinal artery occlusion. The other options can be ruled out: - Demyelinating optic neuritis would cause vision loss but no RAPD.- Retinal detachment would not cause the retinal whitening. - Temporal arteritis is less likely in the absence of headache or scalp tenderness.- Wet macular degeneration would not cause such sudden complete vision loss.A: Central retinal artery occlusion 