This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Valvular hea diseases, Subject name: Medicine
A patient with angina, exeional syncope and Left ventricular hyperophy is diagnosed with aoic stenosis. What is the predicted life span of this patient? 
Select and explain. 
A. 1 year, B. 2 years, C. 3 years, D. 4 years
C: 3 years
Answer: C: 3 years 
Explanation: Predicted life span based on symptoms in patients of aoic stenosis Angina and exeional syncope :3 years Dyspnea :2 years CHF : 1.5 years