**Core Concept**
Frostbite is a cold-induced injury to the skin and underlying tissues, resulting from prolonged exposure to freezing temperatures. The pathophysiology involves the formation of ice crystals within the tissues, leading to cellular damage and eventual tissue necrosis.

**Why the Correct Answer is Right**
The correct answer refers to the typical progression of frostbite, where the affected area initially becomes pale and numb, followed by a mottled, blue-gray discoloration (frostbite stage I and II). As the damage progresses, the skin may become hard, black, and gangrenous (frostbite stage III), indicating severe tissue necrosis. This transformation occurs due to the destruction of blood vessels and the resulting loss of cellular function.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely incorrect because the timing and progression of frostbite stages can vary depending on the severity of the exposure and individual factors.
**Option B:** This option may refer to the initial stages of frostbite, where the skin becomes pale and numb, but it does not accurately describe the later stages of the condition.
**Option C:** This option may be incorrect because the exact timing of the hard, black skin in frostbite can vary, and it is not a universally accepted standard.

**Clinical Pearl / High-Yield Fact**
It's essential to note that the severity of frostbite can be underestimated, and prompt medical attention is crucial to prevent further tissue damage and promote recovery.

**Correct Answer:** Not provided. The correct answer is missing.