<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 60-year-old man comes to the emergency department because of a 2-day history of sharp chest pain and a nonproductive cough. The pain worsens with deep inspiration and improves when he leans forward. Three weeks ago, the patient was diagnosed with an ST-elevation myocardial infarction and underwent stent implantation of the right coronary artery. His temperature is 38.4C 101.1F and blood pressure is 13285 mm Hg. Cardiac auscultation shows a high-pitched scratching sound during expiration. An x-ray of the chest shows enlargement of the cardiac silhouette and a left-sided pleural effusion. Which of the following is the most likely underlying cause of this patients current condition?? A: Outpouching of ventricular wall, B: Occlusion of coronary artery stent, C: Embolism to left pulmonary artery, D: Immune response to cardiac antigens, E: Rupture of interventricular septum,  <response>: Based on the patients history of recent stent placement for myocardial infarction, along with the new onset of chest pain, cough, fever, and pleural effusion, the most likely diagnosis is pericarditis. The high pitched scratching sound on auscultation pericardial rub and improvement of pain with leaning forward are classic for pericarditis. An immune response to cardiac antigens released after the myocardial infarction is a common cause of post-MI pericarditis.D: Immune response to cardiac antigens 