Correct Answer: D

Rationale: The correct answer is D: 'Shaky feeling and dizziness.' Hypoglycemia in children often presents with symptoms like shakiness, dizziness, sweating, hunger, and irritability. These symptoms occur because the brain and body are deprived of the glucose they need to function properly. Choices A, B, and C are incorrect because lethargy, thirst, nausea, and vomiting are not typically primary manifestations of hypoglycemia in children.

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: A

Rationale: Calcium gluconate, sodium bicarbonate, and glucose with insulin are used as temporary measures to rapidly reduce serum potassium levels. They help shift potassium into cells and stabilize the heart but do not remove potassium from the body like dialysis does.

Correct Answer: D

Rationale: The effectiveness of prednisone in treating MCNS is indicated by diuresis and a decrease in urinary protein excretion. Subsidence of generalized edema is also a positive sign, but the key indicator is the reduction in proteinuria, which is achieved through diuresis.

Correct Answer: A

Rationale: The correct answer is A: Petechiae, fever, fatigue. Children with leukemia commonly present with petechiae (due to low platelet count), fever (due to infection), and fatigue (due to anemia), which are classic manifestations of the disease. Option B is incorrect because headache, papilledema, and irritability are more indicative of increased intracranial pressure, not leukemia. Option C is incorrect as muscle wasting and weight loss are not typical initial manifestations of leukemia in children. Option D is incorrect as decreased intracranial pressure, psychosis, and confusion are not commonly associated with leukemia.