Correct Answer: B

Rationale: The correct answer is B: Total placenta previa. In this condition, the placenta completely covers the cervix, posing a risk of severe bleeding during vaginal delivery. Cesarean birth is necessary to avoid potential life-threatening complications for both the mother and the baby. Partial abruptio placentae (choice A) involves premature separation of the placenta, but it doesn't always require a cesarean birth. Ectopic pregnancy (choice C) occurs when the fertilized egg implants outside the uterus, typically requiring surgical intervention but not always a cesarean birth. Eclampsia (choice D) is a serious condition characterized by high blood pressure and seizures, but it doesn't always necessitate cesarean birth unless there are other complications that require it.

Correct Answer: C

Rationale: Rationale for Correct Answer (C - Taper infusion gradually): 1. Tapering the infusion gradually allows for a smooth transition off PN without causing metabolic disturbances. 2. Abruptly stopping PN can lead to hypoglycemia and electrolyte imbalances. 3. Increasing the rate may cause fluid overload or hyperglycemia. 4. Hanging 5% dextrose alone does not provide adequate nutrition and may not meet the patient's needs.

Correct Answer: B

Rationale: The correct answer is B: Vulvodynia. Vulvodynia is characterized by chronic vulvar pain or discomfort, including stabbing pain and burning, without an identifiable cause. In this case, the young girl is experiencing these symptoms despite not being sexually active, ruling out other conditions like vulvitis (inflammation of the vulva), vaginitis (inflammation of the vagina), and Bartholin's cyst (fluid-filled swelling near the vaginal opening). The absence of sexual activity suggests that the pain is not related to an infection or trauma, further supporting the diagnosis of vulvodynia.

Correct Answer: A

Rationale: The correct answer is A because floaters are commonly caused by age-related changes in the vitreous humor of the eye, such as the formation of tiny fibers or clumps. These floaters are typically harmless and not a cause for concern. Choice B is incorrect because glasses do not affect floaters in the eye. Choice C is incorrect because floaters are not a primary symptom of glaucoma. Choice D is incorrect because weakened ciliary muscles are not typically associated with floaters. Therefore, the most appropriate interpretation is that seeing floaters is a normal aging process of the eye.

Correct Answer: B

Rationale: The correct answer is B: The need for the parents to carry an epinephrine pen. This is the priority for health education because in case of another anaphylactic reaction to walnuts, immediate administration of epinephrine can be life-saving. Immunotherapy (choice A) is not the primary focus in an emergency situation. Maintaining immunization status (choice C) is important but not as critical as having an epinephrine pen. Avoiding high potential allergens (choice D) is important but having an epinephrine pen takes precedence in managing severe allergic reactions.