<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 67-year-old woman is brought to the emergency department by her caretakers for a change in behavior. The patient lives in a nursing home and was noted to have abnormal behavior, urinary incontinence, and trouble walking. The patient has been admitted to the hospital before for what seems to be negligence from her caretakers. Laboratory values are ordered as seen below.Serum:Na: 120 mEqLCl-: 98 mEqLK: 4.3 mEqLHCO3-: 25 mEqLBUN: 20 mgdLGlucose: 99 mgdLCreatinine: 1.1 mgdLCa2: 10.2 mgdLUrinalysis is notable for bacteruria without pyuria or nitrates. Physical exam is notable for a confused woman who is unable to answer questions appropriately. She states she has no pain or symptoms and is not sure why she is here. She thinks the year is 1982. Which of the following complications could be seen with treatment of this patient?? A: Autoimmune pontine demyelination, B: Central nervous system infection, C: Cerebral edema, D: Diarrhea and flora destruction, E: Osmotic demyelination,  <response>: This is a question about hyponatremia low sodium level in an elderly patient. The history and lab values are consistent with chronic hyponatremia. The question asks about potential complications that could be seen with treatment. Choice A is incorrect, as autoimmune pontine demyelination is not associated with hyponatremia or its treatment. Choice B is incorrect, as there are no signs of CNS infection on the history or labs. The confusion could be from the hyponatremia.Choice C is incorrect. Cerebral edema may be associated with acute severe hyponatremia, but this case represents chronic hyponatremia where the brain has had time to adapt. Choice D may occur with rapid overcorrection of chronic hyponatremia. However, this is a potential complication of treatment, rather than the patients current condition.Choice E, osmotic demyelination syndrome, is the correct answer. This is a potential complication of overly rapid correction of chronic severe hyponatremia.E: Osmotic demyelination 