<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 73-year-old female with no past medical history is hospitalized after she develops a fever associated with increasing shortness of breath. She states that 1 week prior, she had a cold which seemed to be resolving. Yesterday, however, she noticed that she started to feel feverish, measured her temperature to be 101.5F 38.6C, and also developed an unproductive dry cough and difficulty breathing. On exam, her temperature is 100.8F 38.2C, blood pressure is 11072 mmHg, pulse is 96min, and respirations are 16min. Her exam demonstrates decreased breath sounds at the right lung base. The chest radiograph shows a right-sided pleural effusion with an opacity in the right lower lobe that is thought to be a bacterial pneumonia. Which of the following can be expected on a sample of the effusion fluid?? A: Clear fluid, B: Hypocellular fluid, C: Malignant cells, D: Protein-rich fluid, E: Specific gravity of 1.010,  <response>: This is a clinical vignette describing a 73-year-old woman with fever, cough, and shortness of breath who is found to have a right-sided pleural effusion and pneumonia on chest x-ray. The question asks about the expected findings in a sample of the pleural fluid. Based on the clinical presentation of an acute infection, the effusion is likely a parapneumonic effusion associated with the pneumonia. Parapneumonic effusions are exudative effusions that are protein-rich and contain inflammatory cells. Choice A can be eliminated because parapneumonic effusions are not clear or transudative. Choice B can be eliminated because parapneumonic effusions contain inflammatory cells and are not hypocellular. Choice C can be eliminated because there is no indication of malignancy in this clinical scenario. Choices D and E are both consistent with a parapneumonic exudative effusion - it would be protein-rich and have an elevated specific gravity.D: Protein-rich fluid 