<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 5-year-old boy presents to his pediatrician for a well-child visit. His mother reports him to be doing well and has no concerns. The boy was born at 39 weeks gestation via spontaneous vaginal delivery. He is up to date on all vaccines and is meeting all developmental milestones. On physical exam, he is noted to have a right upper extremity blood pressure of 15080 mm Hg. 2 radial pulses and trace femoral pulses are felt. Cardiac auscultation reveals a regular rate and rhythm with a normal S1 and S2. A 26 long systolic murmur with systolic ejection click is heard over left sternal border and back. The point of maximal impact is normal Which of the following is the most likely diagnosis?? A: Takayasu arteritis, B: Interrupted aortic arch, C: Pheochromocytoma, D: Coarctation of the aorta, E: Essential hypertension,  <response>: This is a clinical vignette about a 5-year-old boy with an incidental finding of high blood pressure in his right arm during a well-child visit. The key findings are a blood pressure discrepancy between his right and left arms, decreased femoral pulses compared to radial pulses, and a systolic murmur with ejection click heard on cardiac auscultation. The blood pressure discrepancy and decreased femoral pulses indicate a narrowing of the aorta, likely in the area of the isthmus or descending aorta. This causes decreased blood flow to the lower extremities. The murmur and ejection click are classic findings with coarctation of the aorta due to turbulent flow across the narrowing. Takayasu arteritis is a large vessel vasculitis that would not present in this manner. Interrupted aortic arch would present as a neonate. Pheochromocytoma may cause hypertension but would not cause the murmur or pulse discrepancy. Essential hypertension is unlikely in a 5-year-old.D: Coarctation of the aorta 