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
SET centres are established if prevalence % leprosy is – 
Select and explain. 
A. 0.5–1/ 1000, B. 1–5, C. 5–10, D. 10
B: 1–5
Answer: B: 1–5 
Explanation: Survey Education and Treatment (SET) Centre →  Was advised where prevalence was 1-5 per 1000.

A SET Centre is attached with: PHC in rural area
Administrative control: Medical Officer (PHC)
Population catered: 20,000 — 25,000
Staff One paramedical worker
Functions:


Detection of cases early by house-to-house survey
Health education about leprosy
Free treatment of all cases and follow-up
Contact tracing and their chemoprophylaxis with Dapsone