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
While assessing the risk of fatality among adults from the Pneumonia Severity Index, which of the following factor is most impoant 
Select and explain. 
A. Age, B. Presence of congestive Hea Failure, C. Hypothermia, D. Hyponatremia
A: Age
Answer: A: Age 
Explanation: Ans. a. Age