<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:Prior to undergoing a total knee arthroplasty, a 62-year-old man with coronary artery disease undergoes diagnostic cardiac catheterization. The catheter is inserted via the femoral artery and then advanced to the ascending aorta. Pressure tracing of the catheter is shown. The peak marked by the arrow is most likely caused by which of the following?? A: Opening of the pulmonic valve, B: Right atrial relaxation, C: Closure of the aortic valve, D: Right ventricular contraction, E: Left atrial contraction,  <response>: This is a question about interpreting a pressure tracing from a catheter inserted into the femoral artery and advanced to the ascending aorta. The key finding is a peak marked by an arrow. Based on the location of the catheter in the ascending aorta, this peak likely corresponds to closure of one of the valves that connects to the aorta. The aortic valve connects the left ventricle to the aorta, so closure of the aortic valve occurs after left ventricular contraction and corresponds to the dicrotic notch seen on arterial pressure tracings. The pulmonic valve is not directly connected to the ascending aorta, so its opening would not cause a peak on this tracing. The right atrium and right ventricle connect to the pulmonary artery, not directly to the ascending aorta, so their relaxation and contraction would also not cause a peak on this tracing.The left atrium connects to the left ventricle, not directly to the ascending aorta, so left atrial contraction would not cause a peak on this tracing.Therefore, the peak marked by the arrow most likely corresponds to closure of the aortic valve.C: Closure of the aortic valve 