<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 13-year-old boy presents to the pediatrician with yellow discoloration of the sclerae since yesterday, and dark-colored urine for 2 days. A detailed history is taken and reveals that he had a cough, cold, and fever the week before the onset of the current symptoms, and was treated with over-the-counter medications. He reports an improvement in his upper respiratory symptoms but has been experiencing fatigue, nausea, and poor appetite since then. There is no past history of recurrent nausea, vomiting, jaundice or abdominal pain, and he has not received any blood transfusion. In addition, he frequently eats at a roadside restaurant near his school. His growth and development are normal for his age and sex. The temperature is 37.9C 100.2F, pulse is 96min, blood pressure is 11070 mm Hg, and the respiratory rate is 22min. The physical examination shows icterus. The examination of the abdomen reveals tender hepatomegaly with the liver having a firm, sharp, and smooth edge. The laboratory test results are as follows:Hemoglobin 14.2 gdLWBC white blood cell 10,500mm3Differential leukocyte count Segmented neutrophils 56Bands 4Lymphocytes 35Eosinophils 2Basophils 0Monocytes 3Platelet count 270,000mm3Serum total bilirubin 8.4 mgdLSerum direct bilirubin 7.8 mgdLSerum alanine aminotransferase 350 ULSerum alkaline phosphatase 95 ULProthrombin time 20 secondsWhich of the following laboratory tests is most likely used to diagnose the condition of this patient?? A: Serum anti-HAV IgM antibody, B: Plasma tyrosine and methionine, C: Urine for reducing substances, D: Quantitative assay for glucose-6-phosphate dehydrogenase G6PD activity, E: Percutaneous liver biopsy,  <response>: This is a clinical case of a 13-year-old boy presenting with jaundice, dark urine, fatigue, nausea, poor appetite, and tender hepatomegaly after a recent upper respiratory infection. The key findings are:- Jaundice and dark urine indicate conjugated hyperbilirubinemia. - Tender hepatomegaly points to acute hepatitis.- History of recent upper respiratory infection makes viral hepatitis likely.- Markedly elevated ALT and moderate bilirubin suggests acute hepatocellular injury typical of viral hepatitis. - Normal alkaline phosphatase rules out biliary obstruction.- Normal platelet count makes chronic liver disease unlikely.The most likely diagnosis is acute viral hepatitis, specifically hepatitis A given the clinical presentation and exposure history. Serum anti-HAV IgM antibody is the diagnostic test of choice to confirm acute hepatitis A infection. The other options would not help diagnose the condition in this patient.A: Serum anti-HAV IgM antibody 