<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 51-year-old man comes to the physician because of progressively worsening dyspnea on exertion and fatigue for the past 2 months. Cardiac examination shows no murmurs or bruits. Coarse crackles are heard at the lung bases bilaterally. An ECG shows an irregularly irregular rhythm with absent p waves. An x-ray of the chest shows globular enlargement of the cardiac shadow with prominent hila and bilateral fluffy infiltrates. Transthoracic echocardiography shows a dilated left ventricle with an ejection fraction of 40. Which of the following is the most likely cause of this patients condition?? A: Uncontrolled essential hypertension, B: Chronic supraventricular tachycardia, C: Deposition of misfolded proteins, D: Inherited β-myosin heavy chain mutation, E: Acute psychological stress,  <response>: Based on the information provided in the question stem, the key findings are:- Progressive dyspnea on exertion and fatigue over 2 months - Irregularly irregular heart rhythm without p waves on ECG - suggests atrial fibrillation- Enlarged cardiac shadow and prominent hila on chest X-ray - Bilateral lung infiltrates on chest X-ray- Dilated left ventricle with reduced ejection fraction on echocardiogramThese findings are most consistent with heart failure. Atrial fibrillation and reduced ejection fraction point towards a diagnosis of heart failure with reduced ejection fraction HFrEF. Of the choices provided, chronic supraventricular tachycardia choice B is incorrect, as the ECG shows atrial fibrillation rather than regular tachycardia. The other choices do not explain the constellation of symptoms and test findings described.B: Chronic supraventricular tachycardia 