<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:Four days after undergoing an elective total hip replacement, a 65-year-old woman develops a DVT that embolizes to the lung. Along with tachypnea, tachycardia, and cough, the patient would most likely present with a PaO2 of what?? A: 120 mmHg, B: 110 mmHg, C: 100 mmHg, D: 85 mmHg, E: 60 mmHg,  <response>: This is a question about a patient who developed a deep vein thrombosis DVT 4 days after a hip replacement surgery, and the DVT embolized to the lung, causing a pulmonary embolism PE. The question is asking about the expected oxygen partial pressure PaO2 in arterial blood for a patient with a PE. A PE causes ventilationperfusion mismatch in the lungs, leading to impaired gas exchange and hypoxemia. The degree of hypoxemia depends on the size of the PE and how much of the pulmonary vasculature is occluded. Of the choices given, a PaO2 of 60 mmHg would indicate severe hypoxemia and is most consistent with a moderate to large PE. The other PaO2 values 100-120 mmHg would be too high and indicate only mild hypoxemia for a PE.E: 60 mmHg 