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
[{'content': 'Environmental manipulation to enable BEST expression of genotype is known as: \nSelect and explain. \nA. Eugenics, B. Euthenics, C. Gene therapy, D. Euthanasia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Euthenics deals with the "improvement" through altering external factors and environment to enable adequate expression of genotype. Ref: Park 21st edition page: 767.', 'role': 'assistant'}]