Correct Answer: C

Rationale: A flat anterior fontanel indicates effective treatment for dehydration in infants. Dehydration often causes sunken fontanels, so when the anterior fontanel becomes flat, it suggests that rehydration has occurred. Sunken anterior fontanel (Choice A) is a sign of dehydration, not effective treatment. Tenting skin turgor (Choice B) is also a sign of dehydration, indicating poor skin turgor. Hyperpnea (Choice D) is increased depth and rate of breathing and is not directly related to the hydration status of the client.

Correct Answer: A

Rationale: The correct answer is A: Recent blood transfusion. A recent blood transfusion can interfere with the effectiveness of the MMR vaccine, making it a contraindication. Choice B, allergy to penicillin, is not a contraindication for the MMR vaccine. Choice C, minor acute illness, is not a contraindication unless the child has a moderate to severe illness. Choice D, low-grade fever, is not a contraindication as long as the child does not have a moderate to severe febrile illness.

Correct Answer: C

Rationale: The correct answer is C: Impaired liver function. Impaired liver function is a contraindication to the use of oral contraceptives because they are metabolized in the liver. Choices A, B, and D are incorrect. Thyroid disease, allergy to penicillin, and abnormal blood glucose levels are not contraindications to combined oral contraceptives.

Correct Answer: C

Rationale: The most appropriate question for the nurse to ask is whether the client has any active herpes lesions. This is crucial because the presence of active lesions can necessitate a cesarean section to prevent transmission of the virus to the newborn. Asking about membrane rupture (choice A) is important but not directly related to the client's herpes simplex virus 2 status. Inquiring about the frequency of contractions (choice B) is relevant for assessing labor progression but does not address the immediate concern of herpes transmission. Asking about being positive for beta strep (choice D) is important for determining the need for prophylactic antibiotics during labor, but it is not directly related to the client's herpes simplex virus 2 status.

Correct Answer: C

Rationale: Montelukast is a leukotriene receptor antagonist that helps reduce swelling and mucus production in the airways, making it useful for long-term asthma management.