<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 14-year-old boy is brought to the physician because of fever, malaise, and severe right knee joint pain and swelling for 3 days. He had also had episodes of abdominal pain and epistaxis during this period. Five days ago, he had swelling and pain in his left ankle joint which has since resolved. He reports having a sore throat 3 weeks ago while he was camping in the woods, for which he received symptomatic treatment. His immunizations are up-to-date. His temperature is 38.7C 101.6F, pulse is 119min, and blood pressure is 9060 mm Hg. Examination shows a swollen, tender right knee; range of motion is limited. There are painless 3- to 4-mm nodules over the elbow. Cardiopulmonary examination is normal. His hemoglobin concentration is 12.3 gdL, leukocyte count is 11,800mm3, and erythrocyte sedimentation rate is 58 mmh. Arthrocentesis of the right knee joint yields clear, straw-colored fluid; no organisms are identified on Gram stain. Analysis of the synovial fluid shows a leukocyte count of 1,350mm3 with 17 neutrophils. Which of the following is the most likely diagnosis?? A: Acute rheumatic fever, B: Infective endocarditis, C: Lyme disease, D: Kawasaki disease, E: Juvenile idiopathic arthritisn,  <response>: This is a clinical case scenario involving a 14-year-old boy with fever, malaise, right knee pain and swelling, abdominal pain, epistaxis, and history of left ankle swelling. Important findings include:- Recent camping trip and sore throat - Fever, tachycardia, hypotension- Swollen, tender right knee with limited range of motion- Painless elbow nodules- Normal cardiopulmonary exam- Mild anemia, elevated WBC count, high ESR- Clear synovial fluid from right knee with mild pleocytosisThis presentation is most consistent with acute rheumatic fever. The recent history of pharyngitis while camping, along with migratory polyarthritis, carditis tachycardia, hypotension, and subcutaneous nodules point towards rheumatic fever as the likely diagnosis. The other options can be ruled out based on the clinical and lab findings.A: Acute rheumatic fever 