This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET Jan 2020, Subject name: Pediatrics
Fig of 3 signs is seen in? 
Select and explain. 
A. Mitral Stenosis, B. Coarctation of Aoa, C. Transposition of Great Aeries, D. Aoic Stenosis
B: Coarctation of Aoa
Answer: B: Coarctation of Aoa 
Explanation: Coarctation of Aoa - Juxta-ductal pa of AOA is mostly involved Medial wall of AOA is usually spared Clinical presentation - Hypeension Milder disease - Intermittent claudication of lower limbs Severe disease - Hea failure in neonate with B/L feeble or impalpable femoral pulses CXR - Figure of 3 sign Notching of inferior margin of 3rd - 9th ribs , usually seen in >3 years age Contrast Esophagogram and Barium swallow - E sign Treatment - Balloon angioplasty Anti-hypeensives for HTN