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: Dental
The health promotional phase in public health is between
the years: 
Select and explain. 
A. 1880-1920, B. 1920-1960, C. 1960-1980, D. 1981-2K
B: 1920-1960
Answer: B: 1920-1960 
Explanation: Disease control phase: 1880 - 1920
Health promotional phase: 1920 - 1960
Social engineering phase: 1960 - 1980
Health for all phase: 1981-2000

Essentials of preventive and community dentistry 
Soben Peter 
5th edition