This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
In Valvular Aortic Stenosis poorest prognosis is indicated when 
Select and explain. 
A. Angina occurs, B. Syncope occurs, C. Dyspnoea occurs, D. Palpitation occurs
C: Dyspnoea occurs
Answer: C: Dyspnoea occurs 
Explanation: (C) Dyspnoea occurs > Death in patients with severe AS occurs most commonly in the seventh and eighth decades.# The average time to death after the onset of various symptoms was as follows: Angina pectoris-3 years; Syncope-3 years; Dyspnea - 2 years; Congestive heart failure - 1.5 to 2 years.> Congestive heart failure was considered to be the cause of death in one-half to two-thirds of patients.> Among adults dying with valvular AS, sudden death, which presumably resulted from an arrhythmia, occurred in 10 to 20% and at an average age of 60 years.