**Core Concept**
Coagulative necrosis is a type of accidental cell death that occurs due to ischemia, leading to the preservation of cell outlines and a relatively intact cellular structure for a period of time. This type of necrosis is commonly seen in organs with a low rate of cell turnover, such as the kidney and heart.

**Why the Correct Answer is Right**
Coagulative necrosis is caused by the loss of cellular ATP, which is essential for maintaining cellular homeostasis. When blood flow is interrupted, the lack of oxygen and nutrients leads to a rapid decrease in ATP production. As a result, cellular enzymes and structures become denatured and precipitate, forming a coagulative mass that retains the cell's outline. The ischemic environment also leads to the activation of various proteases and lipases, which further contribute to the breakdown of cellular components.

**Why Each Wrong Option is Incorrect**
**Option A:** While apoptosis is a type of programmed cell death, it is not the primary cause of coagulative necrosis. Apoptosis involves the activation of specific signaling pathways that lead to the controlled breakdown of cellular components.
**Option B:** Liquefactive necrosis is a different type of accidental cell death, characterized by the breakdown of cellular components and the formation of a liquid, gelatinous mass. This type of necrosis is commonly seen in organs with a high rate of cell turnover, such as the brain and liver.
**Option C:** Caseous necrosis is a type of necrosis that is characteristic of tuberculosis infections. It is not a primary cause of coagulative necrosis and is not related to ischemia.

**Clinical Pearl / High-Yield Fact**
Coagulative necrosis is often seen in the setting of cardiac arrest, where the lack of blood flow leads to the death of cardiac myocytes. Understanding the pathophysiology of coagulative necrosis is essential for diagnosing and managing patients with cardiac arrest.

**Correct Answer: B. Liquefactive necrosis**