Correct Answer: B

Rationale: The correct answer is to inspect the nares and ears for skin breakdown. This is important because the nasal cannula can cause skin breakdown due to prolonged use and friction. Ensuring that the skin is intact helps prevent complications. Choice A is incorrect as oxygen therapy via a nasal cannula does not involve mist. Choice C is incorrect as lubricating the tips of the cannula is not a standard practice and may lead to complications. Choice D is incorrect because while cleanliness is important, maintaining sterile technique is not necessary for handling a nasal cannula in this context.

Correct Answer: D

Rationale: To excel in a health education program, a Public Health Nurse (PHN) must possess a combination of teaching-learning strategies to effectively impart knowledge, provide accurate information to ensure credibility, and communicate ideas effectively to engage and interact with the audience. Therefore, all of these skills are essential for a PHN to succeed in her health education program. Choices A, B, and C are integral components of a successful health education program, making option D the correct answer.

Correct Answer: D

Rationale: The correct answer is D because all the listed sources - interview results with family members, family folder, and actual observation of the family situation - provide comprehensive information about the family. Choice A alone (interview results) might not capture the complete picture of the family, as it may be biased or limited. Choice B (family folder) could contain valuable information but might not be up to date or comprehensive. Choice C (actual observation) is essential to understand the family dynamics, but it alone may not provide all the necessary information. Therefore, the combination of all these sources (D) is needed for a thorough understanding of the family.

Correct Answer: D

Rationale: Irregular hip symmetry, such as asymmetry in the gluteal folds, is a common sign of hip dislocation in newborns. This finding indicates a potential abnormality in hip development and requires further evaluation and possible treatment. Choices A, B, and C are incorrect. Flexion of lower extremities is a normal newborn reflex, the Ortolani response is used to detect hip dysplasia rather than hip dislocation, and a lengthened leg of the affected side is not typically associated with hip dislocation in newborns.

Correct Answer: B

Rationale: Prevalence is the correct answer as it refers to the number of existing cases of a disease in a specific population at a given time. Incidence, on the other hand, refers to the number of new cases of a disease in a defined population over a specific period. Mortality rate is the measure of the number of deaths in a particular population due to a specific cause, while morbidity rate is the frequency of a disease in a specific population.