<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 9-year-old girl presents with dyspnea, palpitations, joint pain, and fever for the past week. She says that her symptoms started 2 weeks ago with bilateral knee pain which has shifted to both ankles over the past week. She says she noticed bilateral leg swelling since yesterday. Past medical history is significant for a severe sore throat, fever, chills, and myalgia 1 month ago which resolved after a week. Her vital signs include: respiratory rate 22min, temperature 37.7C 100.0F, blood pressure 9060 mm Hg, pulse 90min, and SpO2 88 on room air. On physical examination, the patient is ill-appearing with pallor and bilateral pitting edema of legs. The apex beat is prominently located in the 5th intercostal space in the mid-axillary line. Crepitus is noted over both lung bases bilaterally. A loud 36 pansystolic murmur is heard at the apex radiating towards the axilla. S3 and S4 sounds are noted at the left sternal border and cardiac apex. Which of the following is the most likely diagnosis in this patient?? A: Acute rheumatic fever, B: Mitral stenosis, C: Aortic regurgitation, D: Tricuspid regurgitation, E: Aortic stenosis,  <response>: This appears to be a case of acute rheumatic fever based on the history of recent streptococcal pharyngitis sore throat, fever, chills, myalgia followed by migratory polyarthritis and carditis. The physical exam findings of pallor, pitting edema, displaced apex beat, and pansystolic murmur are consistent with mitral regurgitation due to valve damage from rheumatic carditis. The new heart murmur, along with S3 and S4 sounds, point towards acute valvular dysfunction. Of the choices given, acute rheumatic fever best fits the clinical presentation.A: Acute rheumatic fever 