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
What is seen in severe AS – 
Select and explain. 
A. Pulsus bisferiens, B. Late ejection systolic click, C. Heaving shifted apex, D. Loud S2
B: Late ejection systolic click
Answer: B: Late ejection systolic click 
Explanation: Signs of severe aortic stenosis 

Narrow pulse pressure —> Narrower the pulse pressure, more severe the AS.
Systolic thrill in the second left intercostal space.
Later the peak of ejection systolic murmur, severe the AS.
Parodoxically split S.
Presence of S3 or S4.
ST and T changes on ECG.
Cardiomegaly on x-ray.