**Core Concept**
Neurogenic diabetes insipidus is a condition characterized by the deficiency of antidiuretic hormone (ADH), also known as vasopressin, due to damage to the hypothalamus or posterior pituitary gland. This results in an inability to regulate water reabsorption in the kidneys, leading to excessive urine production.

**Why the Correct Answer is Right**
Desmopressin is a synthetic analogue of vasopressin with a longer duration of action and higher selectivity for the V2 receptor in the kidneys. It is the preferred treatment for neurogenic diabetes insipidus because it can effectively mimic the action of vasopressin, promoting water reabsorption and reducing urine output. The V2 receptor plays a crucial role in regulating water reabsorption in the collecting ducts of the kidneys.

**Why Each Wrong Option is Incorrect**
**Option A:** Vasopressin, the natural hormone, has a short duration of action and can cause vasoconstriction, which is not desirable in the treatment of diabetes insipidus. Additionally, its natural fluctuations in plasma levels can lead to inconsistent treatment effects.
**Option B:** Terlipressin is a synthetic analogue of vasopressin with a longer duration of action, but it is primarily used for the treatment of bleeding esophageal varices and other conditions. It has a higher affinity for the V1 receptor, which is involved in vasoconstriction, making it less suitable for the treatment of diabetes insipidus.
**Option D:** Pralipressin is not a recognized synthetic analogue of vasopressin, and its pharmacological properties are not well-defined.

**Clinical Pearl / High-Yield Fact**
Desmopressin is often administered subcutaneously or intranasally, and its effectiveness can be monitored by measuring the urine osmolality and specific gravity. It is essential to note that desmopressin can cause hyponatremia, especially in patients with underlying heart or liver disease.

**✓ Correct Answer: C. Desmopressin**