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
"Hitler intended to improve German race by killing the weak and defective"- this is an example of: 
Select and explain. 
A. Positive eugenics, B. Negative eugenics, C. Euthenics, D. Gene therapy
B: Negative eugenics
Answer: B: Negative eugenics 
Explanation: Negative eugenics has little application in civilized world. People suffering from serious hereditary diseases may be sterilized or otherwise debarred from producing children. Ref: Park 21st edition page: 767.