<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 34-year-old woman comes to the emergency department because of right flank pain and vomiting for 5 hours. She has had fever and chills for the past 2 days. She attended a barbecue 3 days ago, where she ate egg salad. She underwent surgery for left ovarian torsion a year ago. Menses occur at regular 28-day intervals and last 5 days. She is sexually active with 2 male partners and uses condoms inconsistently. Her only medication is an oral contraceptive pill. She is 163 cm 5 ft 4 in tall and weighs 72.5 kg 160 lb; BMI is 27.5 kgm2. She appears uncomfortable. Her temperature is 38.9C 102F, pulse is 101min, and blood pressure is 11876 mm Hg. The lungs are clear to auscultation. The right lower quadrant and right flank show severe tenderness to palpation. Pelvic examination shows no abnormalities. Laboratory studies show:Hemoglobin 12.8 gdLLeukocyte count 14,200mm3Platelet count 230,000mm3SerumNa 136 mEqLK 3.8 mEqLCl- 103 mEqLUrea nitrogen 23 mgdLCreatinine 1.2 mgdLUrineBlood 1Protein 1Glucose negativeLeukocyte esterase positiveNitrites negativeRBC 68hpfWBC 8085hpfWhich of the following is the most likely diagnosis?? A: Ovarian torsion, B: Gastroenteritis, C: Urethritis, D: Pelvic inflammatory disease, E: Pyelonephritis,  <response>: This is a clinical case scenario involving a 34-year-old woman presenting with right flank pain, vomiting, fever, and chills. The key findings are:- Right flank pain and tenderness - Fever, chills - Leukocytosis- Pyuria - Bacteriuria- Prior history of left ovarian torsionBased on the acute presentation with fever, flank pain and tenderness, leukocytosis, and urinalysis findings of pyuria and bacteriuria, this is most consistent with a diagnosis of acute pyelonephritis kidney infection. The prior ovarian torsion is unrelated. Gastroenteritis would not cause flank pain or pyuria. Urethritis could cause dysuria but not systemic symptoms. Pelvic inflammatory disease could cause fever but would not explain flank pain or pyuria.E: Pyelonephritis 