**Core Concept**
The neurohypophysis, also known as the posterior pituitary, is a small structure located at the base of the brain that plays a crucial role in hormone secretion and regulation. Understanding the venous drainage of the neurohypophysis is essential for grasping its function and potential pathologies.

**Why the Correct Answer is Right**
The neurohypophysis receives hormones from the hypothalamus via axonal transport through the pituitary stalk. These hormones are then released into the bloodstream through the posterior pituitary vein, which drains into the cavernous sinus. The posterior pituitary vein is a unique feature of the neurohypophysis, allowing for the regulated release of hormones such as oxytocin and vasopressin into the circulation.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the inferior hypophyseal artery, not its vein, is involved in the blood supply of the neurohypophysis. The venous drainage of the neurohypophysis does not involve the inferior hypophyseal vein.
* **Option B:** This option is incorrect because the superior hypophyseal artery, not its vein, is involved in the blood supply of the neurohypophysis. The venous drainage of the neurohypophysis does not involve the superior hypophyseal vein.
* **Option D:** This option is incorrect because the inferior and superior hypophyseal veins are not directly involved in the venous drainage of the neurohypophysis. The posterior pituitary vein is the primary vessel responsible for draining the neurohypophysis.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that the neurohypophysis is a unique structure with a distinct venous drainage pattern, which is crucial for hormone regulation and secretion. Understanding this anatomy is essential for diagnosing and managing disorders related to the posterior pituitary.

**Correct Answer:** D.