This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pediatrics
Severity of Aoic stenosis is determined by ? 
Select and explain. 
A. Late ejection systolic murmur, B. ST-T changes, C. LV Hyperophy with displaced apex, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Severity of aoic stenosis is determined by late ejection systolic murmur, LVH,ST-T changes. Ref : Ghai essential of pediatrics, eighth edition, p.no:430