<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 47-year-old man comes to the emergency department because of urinary and fecal incontinence for 6 hours. Earlier in the day, he suffered a fall at a construction site and sustained injuries to his back and thighs but did not seek medical attention. He took ibuprofen for lower back pain. His temperature is 36.9C 98.4F, pulse is 80min, and blood pressure is 13284 mm Hg. Examination shows tenderness over the lumbar spine, bilateral lower extremity weakness, absent ankle jerk reflexes, and preserved patellar reflexes. There is decreased rectal tone. An ultrasound of the bladder shows a full bladder. Which of the following is the most likely diagnosis?? A: Spinal epidural abscess, B: Cerebellar stroke, C: Conus medullaris syndrome, D: Anterior spinal cord syndrome, E: Brown-Sequard syndromen,  <response>: This is a clinical vignette describing a 47-year-old man with acute onset urinary and fecal incontinence after a fall and back injury earlier in the day. Key findings include lower back tenderness, bilateral lower extremity weakness, absent ankle reflexes with preserved patellar reflexes, and decreased rectal tone with a full bladder on ultrasound. The differential diagnosis includes spinal cord injury syndromes. Choice A spinal epidural abscess is less likely in this acute presentation without constitutional symptoms like fever. Choice B cerebellar stroke would not cause these spinal cord findings. Choice D anterior spinal cord syndrome is incorrect because patellar reflexes are preserved, suggesting the injury is lower in the spinal cord. Choice E Brown-Sequard syndrome is the closest but does not explain the bilateral lower extremity weakness. Choice C conus medullaris syndrome is the most likely diagnosis given the acute urinary and fecal incontinence from sacral spinal cord injury after trauma, with bilateral lower extremity weakness, absent ankle reflexes, and preserved patellar reflexes. The conus medullaris is the tapered end of the spinal cord that contains the sacral spinal cord segments.C: Conus medullaris syndrome 