**Core Concept**
Hepatic cavernous hemangioma is a benign vascular neoplasm of the liver, characterized by the proliferation of blood vessels within the liver parenchyma. It is a common incidental finding in asymptomatic individuals, often discovered during imaging studies for unrelated reasons.

**Why the Correct Answer is Right**
Cavernous hemangioma is the most common benign liver neoplasm due to its high incidence and prevalence. It is believed to arise from the abnormal proliferation of hepatic stellate cells and endothelial cells, leading to the formation of large, blood-filled vascular spaces. These lesions are usually well-circumscribed and can be easily identified on imaging studies such as ultrasound, CT, or MRI. The typical appearance of a cavernous hemangioma is a well-defined, hypoechoic mass with a characteristic "light bulb" appearance on ultrasound.

**Why Each Wrong Option is Incorrect**
**Option A:** Hepatic adenoma is a rare, benign tumor of the liver, often associated with oral contraceptive use and androgenic-anabolic steroid abuse. It is not as common as cavernous hemangioma and can be more aggressive.

**Option C:** Lipoma is a rare, benign neoplasm of the liver composed of mature adipose tissue. It is much less common than cavernous hemangioma and usually presents as a small, well-defined mass.

**Option D:** Nodular regenerative hyperplasia (NRH) is a rare condition characterized by the formation of regenerative nodules within the liver, often associated with chronic liver disease. It is not a true neoplasm and does not have the same clinical and pathological characteristics as cavernous hemangioma.

**Clinical Pearl / High-Yield Fact**
Remember that cavernous hemangioma is often an incidental finding in asymptomatic individuals, and its diagnosis is usually made on imaging studies. A high index of suspicion is required to avoid missing this common benign liver neoplasm.

**✓ Correct Answer: B. Cavernous hemangioma**