**Core Concept**
Shohl's solution is a type of oral citrate solution, which is used to treat and prevent certain conditions related to the kidneys, particularly those involving excessive calcium excretion.

**Why the Correct Answer is Right**
Shohl's solution contains citrate, which acts as a chelating agent to bind with calcium ions in the urine, forming a soluble complex that can be excreted by the kidneys. This helps to reduce the concentration of calcium in the urine and prevent conditions such as nephrocalcinosis and kidney stones. The citrate in Shohl's solution also has a mild diuretic effect, which helps to increase urine output and further reduce the risk of kidney stone formation.

**Why Each Wrong Option is Incorrect**

* **Option A:** This option is incorrect because Shohl's solution is not typically used to treat conditions related to the pancreas, such as pancreatitis.
* **Option B:** This option is incorrect because Shohl's solution is not a type of laxative; it is used to treat kidney conditions, not constipation.
* **Option C:** This option is incorrect because Shohl's solution is not a type of corticosteroid; it is used to treat kidney conditions, not inflammatory or autoimmune disorders.

**Clinical Pearl / High-Yield Fact**
Shohl's solution is often used in conjunction with other treatments, such as thiazide diuretics, to manage conditions like idiopathic hypercalciuria, a condition characterized by excessive calcium excretion in the urine.

**Correct Answer: D. Treatment of idiopathic hypercalciuria.**