This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Pediatrics
A 10 year old boy presents to the pediatric emergency unit with seizures. Blood pressure in the upper extremity is measured as 200/140 mm Hg. Femoral pulses were not palpable. The most likely diagnosis is: 
Select and explain. 
A. Grandmal seizures, B. Coarctation of aorta, C. Renal parenchymal disease, D. Takayasu aorto arteritis
B: Coarctation of aorta
Answer: B: Coarctation of aorta 
Explanation: Ans. B. Coarctation of aortaIsolated upper extremity hypertension with absent or diminished femoral pulses clearly suggest the diagnosis of Coarctation of aorta.