Correct option is A
Explanation
1. A Sub-Centre covers a population of 3,000–5,000.
2. A PHC covers 20,000–30,000 population.
3. A CHC covers 80,000–1,20,000 population.
Information Booster
1. Sub-Centre is the first contact point between the community and health system.
2. CHC serves as a referral centre for PHCs.
Additional Knowledge
1. Correct matching is 1-C, 2-B, 3-A.
2. The other options contain incorrect population norms for the respective health institutions.