Step 1: The Sub-Centre is the most peripheral health institution and the first point of contact between the primary health care system and the community.
Step 2: Sub-Centres handle interpersonal communication to bring about behavioural change and deliver services in maternal and child health, family welfare, nutrition, immunization, diarrhoea control, and control of communicable diseases.
Step 3: They are also stocked with basic drugs for minor ailments to meet the essential health needs of men, women, and children. Since the Sub-Centre is the most remote/peripheral contact point, (c) is correct. The PHC and Block centre sit at higher levels, and the Anganwadi is part of the ICDS scheme rather than the health-centre hierarchy.