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: Medicine
Reverse split S2 is seen in - 
Select and explain. 
A. Aoic stenosis, B. Aoic stenosis, C. Pulonary aery hypeension, D. Pulmonary stenosis
A: Aoic stenosis
Answer: A: Aoic stenosis 
Explanation: Answer- A. Aoic stenosisDecreased impedance of the systemic vascular bedProstenotic dilatation of the Aoa secondary to Aoic stenosis or regurgitation.Patent ductus aeriosus