This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, 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 bedridden life, D. 1 day of diseased life
B: 1 lost year of healthy life
Answer: B: 1 lost year of healthy life 
Explanation: DALY is a measure of overall disease burden, expressed as a number of years lost due to ill-health, disability or early death. 1 DALY = 1yr of healthy life lost Ref : Park&;s Textbook of Preventive and Social Medicine; 23rd edition; Page 26