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: B

Rationale: The correct benefit of providing Vitamin A supplements to children is reducing the risk of severe measles. Vitamin A supplementation is known to lower the risk of severe measles and its associated complications, making it an important intervention in regions where measles is prevalent.

Correct Answer: B

Rationale: A sunken fontanelle is a common sign of dehydration in infants. The fontanelle is the soft spot on an infant's head where the skull bones have not yet fused. When an infant is dehydrated, the fontanelle can appear sunken or indented. It is important for caregivers and healthcare providers to recognize this sign promptly to ensure timely intervention and hydration for the infant.

Correct Answer: A

Rationale: The correct answer is A, Hepatitis B. The Hepatitis B vaccine is usually administered to newborns within the first 24 hours of birth to provide protection against Hepatitis B infection. This early vaccination helps prevent transmission of the virus from infected mothers to their babies during childbirth, reducing the risk of chronic liver disease and liver cancer later in life.

Correct Answer: A

Rationale: Administering oral rehydration solution is an appropriate method for treating dehydration in infants. Oral rehydration solution helps replace lost fluids and electrolytes effectively, aiding in the rehydration process. It is specifically formulated to address dehydration and is recommended by healthcare professionals for managing this condition in infants.