This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and Family Planning, Subject name: Social & Preventive Medicine
A country has crude birth rate 25 per 1000 and crude death rate 10 per 1000. What is the growth rate of that country - 
Select and explain. 
A. 2.50%, B. 5.00%, C. 15%, D. 1.50%
D: 1.50%
Answer: D: 1.50% 
Explanation: Ans. is 'd' i.e., 1.5% * Growth rate = Crude birth rate - Crude death rate.* Thus, growth rate = 25-10=15 per 1000 or 1.5%