<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 10-year-old boy presents to the emergency department accompanied by his parents with a swollen and painful right knee after he fell from his bicycle a few hours ago. The patients mother says he fell off the bike and struck the ground with his whole weight on his right knee. Immediately, his right knee swelled significantly, and he experienced severe pain. The patients past medical history is significant for previous episodes of easy bruising that manifest as small bluish spots, but not nearly as severe. The family history is significant for an uncle who had similar symptoms, and who was diagnosed at the age of 13 years old. The patient is afebrile, and the vital signs are within normal limits. On physical examination, a large bruise is present over the right knee that is extending several inches down the leg. The right tibiofemoral joint is warm to the touch and severely tender to palpation. Which of the following is the most likely diagnosis in this patient?? A: Hemophilia A, B: Factor V Leiden, C: Homocystinuria, D: von Willebrand disease, E: Protein C deficiency,  <response>: Based on the information provided in the question stem, the key findings are:- 10-year-old boy with swollen and painful right knee after falling off his bicycle- History of easy bruising manifesting as small bluish spots- Family history of uncle with similar symptoms, diagnosed with a bleeding disorder at age 13- Large bruise over right knee, joint is warm and tender - Vital signs are normalThis presentation is most consistent with hemophilia A given the patients age, history of easy bruising, family history of a bleeding disorder, and physical exam findings of a large bruise and swollenpainful joint after minor trauma. The other answer choices can be ruled out as they do not fit with the clinical presentation.A: Hemophilia A 