Correct Answer: A

Rationale: The correct answer is A: Water. Water is the ideal fluid to reconstitute oral rehydration salts because it helps in proper hydration without adding unnecessary sugars or acidity that may be present in fruit juice or soda. Using water ensures the salts are properly dissolved and can effectively rehydrate the individual. Choices B and C are incorrect because fruit juice and soda may contain sugars or acidity that can interfere with the rehydration process and are not recommended for reconstituting oral rehydration salts.

Correct Answer: B

Rationale: A heart rate of 80 bpm is least likely to be observed in a normal newborn. The normal heart rate range for a newborn is usually higher than 80 bpm, typically ranging from 120-160 bpm. The Moro reflex (choice A) is a normal newborn reflex, respirations being irregular (choice C) are expected due to the immature respiratory control center, and an uneven head shape (choice D) is common due to molding during vaginal delivery.

Correct Answer: A

Rationale: Allergy is the correct answer as it is a non-infectious cause of diarrheal diseases. While bacterial, parasitic, and viral infections can lead to diarrhea by affecting the gastrointestinal tract, allergies are immune system reactions triggered by specific substances and are not caused by infectious agents. Bacterial, parasitic, and viral infections are known to cause infectious diarrhea, making choices B, C, and D incorrect.

Correct Answer: B

Rationale: The correct answer is B. Increased urine output is not a warning sign of dehydration; it typically decreases with dehydration. Dehydration often presents with poor skin turgor, tachycardia, and an increased sensation of thirst (eager to drink) as the body tries to compensate for fluid loss. Choices A, C, and D are all correct warning signs of dehydration. Poor skin turgor is a result of decreased skin elasticity due to fluid loss. Tachycardia, an elevated heart rate, can be a compensatory mechanism to maintain cardiac output in dehydration. Feeling eager to drink is a common symptom of dehydration as the body attempts to restore fluid balance.

Correct Answer: D

Rationale: The nurse should ensure that the newborn has a proper latch and is effectively nursing. Sometimes, newborns nurse frequently for comfort even when they are effectively latched. It is essential to address the latch first before considering other interventions. Supplementing with formula (Choice A) may decrease the mother's milk supply. Allowing the newborn to nurse for a set time (Choice B) may not address the underlying latch issue. Reducing nursing sessions (Choice C) may lead to decreased milk production and does not address the latch problem.