ASHA (Accredited Social Health Activist) workers primarily function at which of the following levels?

Under the relaxed norms of the National Health Mission (NHM) for tribal and hilly areas, what is the revised population criteria for setting up a Primary Health Centre (PHC)?

Consider the following statements regarding relaxed healthcare norms for tribal/hilly areas under the National Health Mission: 1. Sub-Health Centres (SHCs): Population criteria reduced to 1,000 (from 5,000 in plains). 2. Primary Health Centres (PHCs): Population criteria reduced to 20,000 (from 30,000 in plains). 3. Community Health Centres (CHCs): Population criteria reduced to 60,000 (from 1,20,000 in plains). Which of the statements given above is/are correct?