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: Social & Preventive Medicine
One DALY signifies: 
Select and explain. 
A. 1 year of disease free life, B. 1 lost year of healthy life, C. 1 month of bed ridden life, D. None of these
B: 1 lost year of healthy life
Answer: B: 1 lost year of healthy life 
Explanation: 1 lost year of healthy life