<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 4-week-old newborn is brought to the physician for a well-child examination. He was born at 40 weeks gestation and weighed 3300 g 7 lb 4 oz. He now weighs 4300 g 9 lbs 1 oz. There is no family history of serious illness. He is at the 50th percentile for height and 50th percentile for weight. Vital signs are within normal limits. Examination shows a grade 36 harsh holosystolic murmur at the left lower sternal border and a soft mid-diastolic murmur over the cardiac apex. The lungs are clear to auscultation. The remainder of the examination shows no abnormalities. Which of the following is the most likely explanation for this patients physical findings?? A: Communication between the pulmonary artery and the thoracic aorta, B: Right-to-left shunt through the atrial septum, C: Left-to-right shunt through the ventricular septum, D: Right ventricular outflow obstruction, E: Right-to-left shunt through the ventricular septum,  <response>: This is a question about interpreting cardiac murmurs in a newborn. The key findings in the stem are a harsh holosystolic murmur at the left lower sternal border and a soft mid-diastolic murmur at the apex. The holosystolic murmur suggests a ventricular septal defect VSD, which causes a left-to-right shunt during systole. The location of the murmur at the left lower sternal border is typical for a VSD. The mid-diastolic murmur suggests aortic or pulmonary valve regurgitation. In a newborn, this is most likely due to pulmonary valve regurgitation associated with a VSD and increased pulmonary blood flow. So the most likely explanation is a ventricular septal defect with increased pulmonary blood flow causing a left-to-right shunt during systole holosystolic murmur and pulmonary valve regurgitation in diastole mid-diastolic murmur.C: Left-to-right shunt through the ventricular septum 