The correct answer is: c) Primary Health Centres (PHCs) & Sub-centres.
Primary Health Centres (PHCs) are the first point of contact for people seeking healthcare in rural areas. They provide basic healthcare services such as immunization, family planning, and treatment of common illnesses. Sub-centres are smaller than PHCs and are located in remote areas. They provide basic healthcare services such as immunization and family planning.
District Hospitals are located in district headquarters and provide secondary and tertiary healthcare services. They have a larger number of beds and more specialized staff than PHCs and sub-centres. Medical Colleges are institutions that provide undergraduate and postgraduate medical education. They also have hospitals attached to them, which provide tertiary healthcare services.
The primary level of healthcare delivery in Arunachal Pradesh comprises of Primary Health Centres (PHCs) & Sub-centres. PHCs are located in all the districts of Arunachal Pradesh and provide basic healthcare services to the people. Sub-centres are located in remote areas and provide basic healthcare services to the people living in those areas.