<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 31-year-old woman presents to the emergency room with high-grade fever and abdominal pain for the past 2 days. She also complains of malaise and has vomited several times since last night. The past medical history is benign. The vital signs include: temperature 40.0C 104.0F, pulse 120min, respiratory rate 28min, and blood pressure 12089 mm Hg. On physical examination, severe costovertebral angle tenderness is noted. She is admitted to the medical floor and blood is drawn. The laboratory testing reveals leukocytosis with predominant neutrophilia and increased C-reactive protein and ferritin levels. She is suspected to have a retroperitoneal organ infection. Which of the following best describes the involved organ?? A: It stores and concentrates bile., B: It produces hydrochloric acid., C: It is composed of tubules and parenchyma., D: It is the most common site of Meckels diverticulum., E: It is composed of white pulp and red pulp.,  <response>: This is a clinical vignette describing a 31-year-old woman presenting with fever, abdominal pain, vomiting, and costovertebral angle tenderness. The history and physical exam findings are consistent with an intra-abdominal infection, likely involving a retroperitoneal organ. The lab results showing leukocytosis, neutrophilia, and elevated inflammatory markers support an infectious process. Based on the location of the pain and tenderness in the costovertebral angle, the likely source is an infection in one of the retroperitoneal organs such as the kidney, ureter, pancreas, or ovaryfallopian tube. The question asks to identify which organ is most likely involved based on its description.C: It is composed of tubules and parenchyma. 