<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 55-year-old IV drug user comes into the emergency department after four days of pain in his right ankle. The patient is lethargic and unable to answer any questions about his medical history. His vitals are HR 110, T 101.5, RR 20, BP 10060. His physical exam is notable for track marks in his toes and his right ankle is erythematous and swollen. Moving any part of the right foot creates a 1010 pain. A radiograph revels no evidence of fractures. A Gram stain of the joint fluid aspirate demonstrates purple cocci in clusters. The fluid is yellow, opaque, with more than 70,000 cellsmm3 80 neutrophils. What is the most likely diagnosis?? A: Monosodium urate crystal formation, B: Salmonella infectious arthritis, C: Staphylococcus infectious arthritis, D: Borrelia infectious arthritis, E: Osteoarthritis,  <response>: This is a clinical case scenario involving a 55-year-old IV drug user presenting with right ankle pain, erythema, and swelling. Key findings include IV drug use history, inability to provide medical history, vital signs showing tachycardia and fever, track marks on toes, severe pain with ankle movement, no fractures on x-ray, and Gram stain showing gram positive cocci in clusters. The sterile joint fluid analysis is consistent with septic arthritis showing elevated white blood cell count with neutrophil predominance. This presentation is most consistent with an infectious arthritis, likely bacterial given the gram positive cocci on Gram stain. The choices include different types of infectious arthritis as well as osteoarthritis. Based on the acute presentation in an IV drug user and presence of gram positive cocci in clusters, the most likely diagnosis is Staphylococcus infectious arthritis.C: Staphylococcus infectious arthritis 