**Core Concept**
Potassium-sparing diuretics are a class of medications that act on the kidneys to increase urine production while minimizing potassium loss in the urine, thus helping to maintain or even increase potassium levels in the blood. This is particularly useful for patients with conditions like heart failure, hypertension, or kidney disease.

**Why the Correct Answer is Right**
Indapamide, on the other hand, is a thiazide-like diuretic that primarily acts on the kidneys to increase sodium and water excretion, but it also has a mild potassium-wasting effect. Unlike the other options, indapamide does not have a significant potassium-sparing effect and can actually lead to potassium loss in the urine.

**Why Each Wrong Option is Incorrect**
**Option A:** Triamterene is a type of potassium-sparing diuretic that acts on the collecting ducts of the kidneys to block sodium reabsorption and increase potassium reabsorption.
**Option B:** Spironolactone is a potassium-sparing diuretic that acts as an aldosterone antagonist, which blocks the action of aldosterone on the collecting ducts and increases potassium levels in the blood.
**Option C:** Amiloride is another type of potassium-sparing diuretic that acts on the collecting ducts to block sodium reabsorption and increase potassium reabsorption, similar to triamterene.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the choice of diuretic depends on the patient's specific needs and medical conditions. Potassium-sparing diuretics are particularly useful for patients with conditions like heart failure or kidney disease, where potassium loss can be a concern.

**Correct Answer:**
✓ Correct Answer: D. Indapamide.