Correct Answer: B

Rationale: A sodium level of 140 mEq/L within the expected reference range indicates effective treatment for dehydration. In dehydration, sodium levels are often elevated, so a normal sodium level suggests that the treatment is helping to restore the electrolyte balance in the infant's body.

Correct Answer: B

Rationale: The most crucial statement to include when teaching a patient prescribed metronidazole (Flagyl) is to avoid alcohol consumption. Mixing metronidazole and alcohol can lead to a disulfiram-like reaction, causing severe symptoms such as nausea, vomiting, and headache. Therefore, it is essential to emphasize to the patient the importance of abstaining from alcohol while taking this medication to prevent adverse reactions.

Correct Answer: A

Rationale: Pizza with a fruit plate is the most suitable choice for a 6-year-old child with hypokalemia due to its potassium content. Potassium-rich foods like fruits can help replenish potassium levels in the body, aiding in the treatment of hypokalemia.

Correct Answer: B

Rationale: Hypospadias is a congenital condition where the opening of the urethra is on the underside of the penis. Surgical repair is the primary treatment for hypospadias and is usually recommended to be done before 18 months of age. This timing is preferred for optimal cosmetic and functional outcomes. Waiting until preschool age for corrective surgery may increase the complexity of the procedure and potential complications. Correcting hypospadias does not impact the risk of testicular cancer.

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.