Correct Answer: D

Rationale: The Absolute Neutrophil Count (ANC) is crucial for determining the child's ability to fight infections. Neutrophils play a key role in combating bacterial infections. Monitoring the ANC is essential before administering chemotherapy, as a low ANC indicates an increased risk of infection. Hemoglobin, red blood cell count, and platelets are important for assessing oxygen-carrying capacity, anemia, and clotting function, respectively, but they do not directly reflect the child's capability to fight infections.

Correct Answer: D

Rationale: Gender assignment in cases of ambiguous genitalia is a complex process that requires a multidisciplinary approach, including genetic, endocrinological, and psychological evaluations. The decision should be made collaboratively with the parents.

Correct Answer: B

Rationale: Signs of kidney transplant rejection include fever, diminished urinary output, and swelling/tenderness in the graft area. These symptoms indicate that the body may be rejecting the transplanted organ, requiring immediate medical attention.

Correct Answer: C

Rationale: A low-phosphorus diet is important in managing chronic renal failure to prevent hyperphosphatemia and its associated complications, such as bone disease. Protein intake should be controlled but not necessarily low, and vitamin D supplementation is often required, not reduced.

Correct Answer: B

Rationale: The correct answer is B, self-actualization. Self-actualization is the highest level in Maslow's hierarchy of needs, representing the realization of one's full potential. While love is an essential need, self-actualization builds upon the fulfillment of basic needs like safety and love. Esteem needs relate to feelings of accomplishment and recognition, which come before self-actualization. Physiological needs such as food, water, and shelter are the most basic needs at the bottom of the hierarchy.