This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
A ten year old boy presents to the pediatric emergency unit with seizures. Blood pressure in the upper extremity measured as 200/140 mm Hg. Femoral pulses were not palpable. The most likely diagnosis amongst the following is - 
Select and explain. 
A. Takayasu aooaeritis, B. Renal parenchymal disease, C. Grandmal seiures, D. Coarctation of aoa
D: Coarctation of aoa
Answer: D: Coarctation of aoa 
Explanation: Ans. is 'd' i.e., Coarctation of aoa Isolated upper extremity hypeension (200/140 mm Hg), together with absent/diminished femoral pulses is a characteristic feature of coarction of aoa.