Correct Answer: A

Rationale: The priority nursing diagnosis in this scenario is 'Risk for Impaired Skin Integrity' because severe edema in the left lower extremity can lead to compromised circulation and pressure ulcers, increasing the risk of skin breakdown and infection. Addressing and preventing impaired skin integrity is crucial for the child's overall health and well-being.

Correct Answer: A

Rationale: Boiling the nipples and pacifiers for 20 minutes each day is an appropriate measure to prevent reinfection of oral candidiasis. This practice helps eliminate the Candida fungus from these items, reducing the risk of the child getting reinfected. It is crucial for the parent to follow this hygienic practice consistently to ensure the child's recovery and prevent the spread of the infection.

Correct Answer: D

Rationale: It is important for the caregiver to instruct the parent to brush the child's teeth after administering ferrous sulfate to prevent staining of the teeth. Iron in ferrous sulfate can cause teeth discoloration, so brushing the child's teeth after taking the medication helps prevent this side effect.

Correct Answer: B

Rationale: Wearing sandals allows air circulation around the feet, reducing perspiration and eliminating the environment for bacteria and fungus to thrive. This promotes the healing of the fungal infection. Therefore, the correct answer is B.

Correct Answer: D

Rationale: The correct answer is D because infants' kidneys are less developed compared to older children, making them less efficient at concentrating urine. This results in a lower specific gravity in infants. The other choices do not directly explain why the specific gravity is lower in infants.