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
Statistical method of calculate_ death rate among two population with different age groups? 
Select and explain. 
A. Crude death rate, B. Standardized death rate, C. Case fatality rate, D. Age specific death rate
B: Standardized death rate
Answer: B: Standardized death rate 
Explanation: Ans. is 'b' i.e., Standardized death rate o Age adjustment or age standardization removes the confounding effect of different age structures of two different population and yields a single standardized rate, by which the moality experience can be compared directly.