**Core Concept**
Crush syndrome is a life-threatening condition caused by the release of myoglobin and other intracellular contents into the bloodstream after severe muscle trauma, such as in a motor vehicle accident or crush injury. This leads to acute kidney injury (AKI), hyperkalemia, and metabolic acidosis.

**Why the Correct Answer is Right**
The correct answer is **hyperkalemia**. Crush syndrome is characterized by the release of myoglobin and other intracellular contents into the bloodstream, which can cause acute kidney injury (AKI). AKI leads to a buildup of potassium ions (K+) in the bloodstream, resulting in hyperkalemia. This is due to the inability of the kidneys to effectively filter potassium, leading to elevated serum potassium levels.

**Why Each Wrong Option is Incorrect**
**Option A:** Rhabdomyolysis is actually a key feature of crush syndrome, as it is the breakdown of muscle tissue that releases myoglobin and other intracellular contents into the bloodstream. So, this option is incorrect because it is a characteristic of crush syndrome, not an exception.

**Option B:** Oliguria is a common feature of crush syndrome, as the acute kidney injury (AKI) caused by the release of myoglobin and other intracellular contents into the bloodstream can lead to a decrease in urine output. So, this option is incorrect because it is a symptom of crush syndrome, not an exception.

**Option C:** Metabolic acidosis is another feature of crush syndrome, as the breakdown of muscle tissue can lead to the release of lactic acid and other acidic substances into the bloodstream. So, this option is incorrect because it is a characteristic of crush syndrome, not an exception.

**Clinical Pearl / High-Yield Fact**
It's essential to recognize the signs and symptoms of crush syndrome, including rhabdomyolysis, oliguria, and metabolic acidosis, and to initiate treatment promptly to prevent long-term kidney damage.

**Correct Answer:** B. Oliguria