Which of the following drugs would be most appropriate for this boy?

Correct Answer: C

Rationale: The correct answer is C: Calcitriol. Calcitriol is the active form of Vitamin D and is used to treat Vitamin D deficiency. The boy likely has a deficiency as he is young and may not be getting enough sunlight or dietary sources. Calcitriol helps the body absorb calcium and phosphorus, essential for bone health. Cholecalciferol (A) is Vitamin D3, not the active form. Calcitonin (B) is a hormone that regulates calcium levels but not typically used for Vitamin D deficiency. Teriparatide (D) is a medication for osteoporosis, not Vitamin D deficiency. Therefore, Calcitriol is the most appropriate choice for this boy.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.