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: B

Rationale: Fullness in the throat after a thyroidectomy could indicate bleeding or a hematoma, which can compress the airway, so hemorrhage is the priority concern. Hypocalcemia typically presents with symptoms like tingling around the mouth or in the extremities, muscle cramps, or seizures, not fullness in the throat. Hypoxia would manifest with symptoms like shortness of breath, confusion, or cyanosis, rather than a feeling of fullness in the throat. Hypothyroidism symptoms include fatigue, weight gain, and cold intolerance, but it does not typically cause acute fullness in the throat postoperatively.

Correct Answer: C

Rationale: The correct answer is C: 'This medication will decrease swelling and mucus production.' Montelukast is a leukotriene receptor antagonist that works by reducing swelling and mucus production in the airways, helping to manage asthma symptoms in the long term. Choices A, B, and D are incorrect because montelukast is not used for immediate relief during asthma attacks, pre-exercise prophylaxis, or short-term treatment; instead, it is taken regularly for asthma control.

Correct Answer: D

Rationale: An absolute neutrophil count of 75/mm³ is critically low and places the client at high risk for infection, necessitating immediate intervention. Neutropenia increases susceptibility to infections, making it essential to report this finding promptly. The other options, such as pain level in pleurisy, drainage amount from a drain, and heart rate postoperatively, are important but do not indicate an immediate life-threatening condition that requires urgent provider notification.

Correct Answer: B

Rationale: The correct answer is B: Jitteriness of the hands. Jitteriness is a key sign of cold stress in a newborn, indicating the need for immediate warming measures. A respiratory rate of 60/min may not be directly indicative of cold stress. Diaphoresis (excessive sweating) and bounding peripheral pulses are not typical findings associated with cold stress in newborns.