Q. Consider the following:

1. Eugenics
2. Euthenics
3. Euphenics

Which of the above involve treatment of genetic diseases?
Answer: Only 3
Notes: Eugenics focuses on improving genetic quality through selective breeding, not treatment. Euthenics aims to enhance human well-being by improving external living conditions, unrelated to genetic disease treatment. Euphenics specifically concerns the phenotypic improvement of individuals, usually via medical intervention, to manage or treat genetic diseases. Therefore, only Euphenics (3) involves treatment of genetic diseases.