<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 35-year-old woman with a medical history significant for asthma, hypertension, and occasional IV drug use comes to the emergency department with fever. On physical exam, there are findings depicted in figure A, for which the patient cannot account. What test will be most helpful to establish the diagnosis?? A: Echocardiography, B: Chest X-ray, C: Pulmonary function tests, D: Electrocardiogram EKG, E: CT pulmonary angiography,  <response>: This is a patient with fever and physical exam findings as shown in the figure. The key findings are Janeway lesions on the palms and Osler nodes on the pads of the fingers. These findings are classic for infective endocarditis. Infective endocarditis is an infection of the heart valves that can occur in IV drug users. The most helpful test to establish this diagnosis would be echocardiography, which allows direct visualization of the heart valves to look for vegetations. Chest X-ray may show signs of heart failure but does not directly evaluate the valves. Pulmonary function tests evaluate lung function and would not be helpful. EKG evaluates electrical conduction in the heart and would not show valvular abnormalities. CT angiography looks for pulmonary embolism which does not explain the physical exam findings.A: Echocardiography 