Correct Answer: A

Rationale: The correct answer is A: a newborn. Newborns are at the highest risk for HBV due to potential transmission from the mother. The hepatitis B virus can be transmitted from an infected mother to her baby during childbirth. Choices B, C, and D are incorrect because newborns have a higher risk due to this mode of transmission, making them more vulnerable compared to older children.

Correct Answer: A

Rationale: Assessing feeding patterns is the priority during a home visit for a family with a new baby because it is crucial for the health and growth of the newborn. By evaluating the feeding patterns, the nurse can ensure that the baby is receiving adequate nutrition and address any feeding issues promptly. While sleeping arrangements, support system, and immunization status are important aspects to assess during a home visit, they are not as critical as ensuring the newborn's nutritional needs are being met.

Correct Answer: A

Rationale: The correct immediate action after recovering an avulsed tooth is to rinse it with water and place it back in the socket. This helps preserve the tooth and increases the chances of successful re-implantation. Placing the tooth in a clean plastic bag for transport to the dentist (choice B) is not ideal as immediate re-implantation is preferred. Holding the tooth by the roots until reaching the emergency room (choice C) can further damage the tooth. Asking the child to replace the tooth even if bleeding continues (choice D) is incorrect and may lead to improper re-implantation.

Correct Answer: D

Rationale: The case fatality ratio is calculated as (deaths/cases) * 100. In this case, there were 2 deaths out of 8 cases. Therefore, the calculation is (2/8) * 100 = 25%. Choices A, B, and C are incorrect as they do not match the correct calculation.

Correct Answer: D

Rationale: The best approach when teaching a responsible family member a procedure for the patient is to demonstrate the procedure. By demonstrating, the family member can visually see how it is done, making it easier for them to understand and replicate. This hands-on approach is more effective than just describing the procedure (choice C) or arranging for practice (choice B) without a visual demonstration. Performing all the steps (choice A) may not be practical or necessary when the goal is to teach someone else how to do it.