<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 13-year-old teenage girl was brought to the emergency department by her mom after she collapsed. Her mom reports that she was at a birthday party when all of a sudden she fell. She reported left foot weakness and has been limping ever since. The patient has been healthy and had an uncomplicated birth history, though her mom reports that she just recovered from a cold. She currently lives with her younger sister and mother as her parents recently divorced. She does well in school and has a handful of good friends. Her physical exam demonstrated normal bulk and tone, 55 strength in all motions, 2 and symmetric reflexes at biceps, triceps and knees. She had 1 ankle reflex on left. What is the most likely explanation for her symptoms?? A: Cerebral vascular accident, B: Conversion disorder, C: Guillain-Barre syndrome, D: Multiple sclerosis, E: Myasthenia gravis,  <response>: This is a clinical case scenario involving a 13-year-old girl who collapsed at a party and is now presenting with left foot weakness and limping. The key details in the stem are the acute onset of symptoms in an otherwise healthy teenager, the precipitating stressful event of the party, and the focal neurological deficit limited to reduced left ankle reflex on exam. Guillain-Barre is unlikely given the focal findings. MS rarely presents acutely in this fashion. There are no reports of fatigable weakness to suggest myasthenia gravis. CVA would be exceedingly rare in a previously healthy young teenager. This leaves conversion disorder as the most likely diagnosis, given the acute symptoms after a stressful event with incongruent and non-anatomic findings on exam.B: Conversion disorder 