<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 7-year-old boy presents with right hip pain for the past 2 days. He reports gradual onset of pain and states it hurts to walk. He had a recent cold last week but is otherwise healthy. His temperature is 98.2F 36.8C, blood pressure is 10770 mm Hg, pulse is 90min, respiratory rate is 19min, and oxygen saturation is 98 on room air. Physical exam reveals no swelling or warmth surrounding the joint. The patient is sitting with the right hip flexed, abducted, and externally rotated. Passive range of motion of the hip causes discomfort. The patient is able to ambulate but states it hurts. An initial radiograph of the hip is unremarkable. The patients CRP is 0.10 mgL. Which of the following is the best next step in management of this patient?? A: Arthrocentesis, B: Ibuprofen, C: MRI, D: Prednisone, E: Vancomycin and piperacillin-tazobactam,  <response>: This is a clinical vignette about a 7-year-old boy presenting with right hip pain of gradual onset over the past 2 days. Important history includes recent cold symptoms but otherwise healthy. Vital signs are normal except for mildly elevated heart rate. Physical exam is significant for limited and painful range of motion of the right hip with no swelling or warmth. Initial x-ray is unremarkable and CRP is normal. The presentation is most consistent with transient synovitis, which is inflammation of the hip joint that often follows a viral illness in children. The diagnosis is made clinically and imaging is usually normal early on. Treatment involves anti-inflammatories and limitation of activity. Choice A, arthrocentesis, is too invasive as a next step. Choice B, ibuprofen, is the best initial treatment. Choice C, MRI, may be indicated later if symptoms persist but is not necessary yet with normal x-ray. Choice D, prednisone, is not indicated as an initial treatment. Choice E, IV antibiotics, would be inappropriate without any evidence of infection.B: Ibuprofen 