Correct Answer: C

Rationale: Malaria is caused by the Plasmodium parasite that is transmitted to humans through the bite of infected Anopheles mosquitoes. These mosquitoes act as vectors in transmitting the disease from one host to another. The other choices, Measles, Tuberculosis, and Hepatitis B, are not vector-borne diseases. Measles is a highly contagious airborne viral infection, Tuberculosis is an airborne bacterial infection, and Hepatitis B is a bloodborne virus.

Correct Answer: B

Rationale: Community participation is a fundamental principle of Primary Health Care (PHC) as it involves the active involvement of individuals, families, communities, and organizations in the planning and delivery of healthcare services. This ensures that services are culturally appropriate, accessible, and acceptable to the community, leading to better health outcomes.

Correct Answer: C

Rationale: The primary role of a community health nurse is to focus on promoting health and preventing disease within the community. They work to improve the overall health and well-being of individuals and populations by providing education, preventive care, and support to enhance community health outcomes. Community health nurses collaborate with community members, organizations, and public health agencies to address health disparities, implement health promotion strategies, and advocate for equitable access to healthcare services.

Correct Answer: C

Rationale: Vaccination is the most effective method for preventing the spread of infectious diseases as it helps in developing immunity against specific pathogens, reducing the likelihood of infection and transmission within a population. Antibiotics are used to treat infections, not prevent their spread. Quarantine limits the contact of infected individuals but does not provide long-term prevention. Nutritional supplementation can support overall health but is not a primary method for preventing infectious diseases.

Correct Answer: B

Rationale: The World Health Organization recommends exclusive breastfeeding for the first 6 months of a child's life. During this time, breast milk provides all the necessary nutrients for the baby's growth and development, offering protection against infections and supporting optimal health outcomes. After 6 months, complementary foods can be introduced while continuing breastfeeding up to 2 years of age or beyond.