Correct Answer: B

Rationale: Cyclical variation best describes the periodic fluctuation in the number of Dengue fever cases in the community, typically increasing towards the end of the rainy season and then decreasing during drier periods. This pattern suggests a recurring cycle rather than a sudden outbreak (epidemic), random occurrence (sporadic), or gradual long-term change (secular occurrence).

Correct Answer: B

Rationale: The correct answer is B. Providing technical guidance to the midwife is a key supervisory function of the public health nurse. This guidance helps the midwife in delivering care to clients effectively, especially in adhering to management guidelines such as those in Integrated Management of Childhood Illness. While options A, C, and D involve various aspects of support and collaboration, providing technical guidance aligns directly with the supervisory role of ensuring quality and consistency in the care provided by midwives.

Correct Answer: D

Rationale: The function of epidemiology includes evaluating the effectiveness of interventions, programs, or policies implemented to improve public health outcomes. In this context, epidemiology aids in assessing the impact and success of strategies like the Integrated Management of Childhood Illness in community health practice.

Correct Answer: B

Rationale: Operation Timbang is a form of secondary prevention. It aims to identify individuals in the population who are malnourished, allowing for early diagnosis and timely treatment. Secondary prevention focuses on early detection and intervention to prevent the progression of a health condition or disease.

Correct Answer: C

Rationale: The major goal of devolution, as outlined in RA 7160, is to empower the people and promote their self-reliance. By devolving basic services to local government units, the aim is to enhance people's participation in decision-making processes and foster self-reliance within communities, ultimately promoting empowerment and self-sufficiency.