<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 55-year-old woman is being managed on the surgical floor after having a total abdominal hysterectomy as a definitive treatment for endometriosis. On day 1 after the operation, the patient complains of fevers. She has no other complaints other than aches and pains from lying in bed as she has not moved since the procedure. She is currently receiving ondansetron, acetaminophen, and morphine. Her temperature is 101F 38.3C, blood pressure is 12768 mmHg, pulse is 100min, respirations are 17min, and oxygen saturation is 94 on room air. Her abdominal exam is within normal limits and cardiopulmonary exam is only notable for mild crackles. Which of the following is the most likely etiology of this patients fever?? A: Abscess formation, B: Inflammatory stimulus of surgery, C: Deep vein thrombosis, D: Urinary tract infection, E: Wound infection,  <response>: This is a clinical reasoning question involving a post-operative fever. The key information in the stem is that the patient is 1 day post-op from a hysterectomy, and is complaining of fevers without any other localized symptoms. The choices include various potential causes of post-op fever such as abscess, inflammatory response to surgery, DVT, UTI, and wound infection. To determine the most likely cause, we can rule out choices that are not supported by the stem or are less likely in this scenario. There is no evidence of abscess formation or wound infection this early post-op. A UTI is possible but less likely than other options. DVT could cause fever but no lower extremity swelling or pain is described. By process of elimination, the most likely cause of fever on post-op day 1 without other localizing symptoms is a systemic inflammatory response to the surgical trauma itself. This is a very common cause of post-operative fever in the first 1-2 days after major surgery.B: Inflammatory stimulus of surgery 