<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A previously healthy 68-year-old woman is brought to the emergency department because of a 3-day history of nausea, anorexia, polyuria, and confusion. Her only medication is acetaminophen, which she takes daily for back pain that started 6 weeks ago. Physical examination shows conjunctival pallor. She is oriented to person but not to time or place. Laboratory studies show a hemoglobin concentration of 9.3 gdL, a serum calcium concentration of 13.8 mgdL, and a serum creatinine concentration of 2.1 mgdL. Her erythrocyte sedimentation rate is 65 mmh. Which of the following is the most likely underlying cause of this patients condition?? A: Excessive intake of calcium, B: Overproliferation of plasma cells, C: Ectopic release of PTHrP, D: Decreased renal excretion of calcium, E: Excess PTH secretion from parathyroid glands,  <response>: Based on the information provided, this patient is a previously healthy 68-year-old woman who now presents with symptoms of nausea, anorexia, polyuria, and confusion over the past 3 days. Important lab findings include anemia, elevated serum calcium, elevated serum creatinine, and high erythrocyte sedimentation rate. The constellation of symptoms, lab abnormalities, and elevated calcium makes me think of a disorder causing excessive bone resorption and calcium release. The anemia and high sedimentation rate point towards an underlying plasma cell disorder such as multiple myeloma. Overproliferation of plasma cells is the most likely cause in this patient.Choices A, C, D, and E can all cause hypercalcemia but are less likely based on the additional findings. There is no evidence to support excessive calcium intake. Ectopic PTHrP, decreased renal excretion of calcium, and excess PTH secretion could cause hypercalcemia but would not explain the anemia and elevated inflammatory markers. B: Overproliferation of plasma cells 