Correct Answer: A

Rationale: Clinical reasoning is purposeful and goal-directed, involving the use of critical thinking and decision-making skills to provide effective patient care.

Correct Answer: D

Rationale: A high white blood cell count (leukocytes of 275,000/mcL) at diagnosis is associated with a worse prognosis in leukemia because it indicates a more aggressive disease with a higher tumor burden. Slow response to chemotherapy (choice A) is a consequence of the aggressive disease and not a determining factor at diagnosis. Platelets of 150,000/mcL (choice B) and leukocytes less than 10,000/mcL (choice C) are within normal ranges and not indicative of a worse prognosis in leukemia.

Correct Answer: B

Rationale: Cephalocaudal development is the correct term that describes the directional pattern of growth from head to tail. This means that the head and upper body parts develop before the lower parts. Choice A, 'Cephalodistal,' refers to growth from the center of the body outward, not head to tail. Choice C, 'Proximodistal,' describes growth from the center of the body towards the extremities, not specifically from head to tail. Choice D, 'Proximocaudal,' is not a recognized term in the context of physical growth and development.

Correct Answer: C

Rationale: The correct answer is C: Acute renal failure in children is often reversible, especially when the underlying cause is identified and treated promptly. It does not always lead to chronic renal failure or the need for a kidney transplant. Choice A is incorrect as prophylactic antibiotics for life are not a standard treatment for acute renal failure. Choice B is incorrect as acute renal failure does not always progress to chronic renal failure. Choice D is incorrect as not all children with acute renal failure will eventually require a kidney transplant.

Correct Answer: B

Rationale: A resting pulse rate of 120 is elevated for a 4-year-old and may indicate an underlying issue that needs further investigation. An ectomorphic body type is a body shape and not typically a cause for concern. Weight gain within normal limits and no significant change in appetite are generally positive findings in a growing child.