**Core Concept**
Neuroleptic malignant syndrome (NMS) is a rare but life-threatening neurological disorder associated with the use of antipsychotic medications. It is characterized by a hypermetabolic state, muscle rigidity, fever, and autonomic dysfunction.

**Why the Correct Answer is Right**
NMS typically develops within 1-2 weeks of initiating or increasing the dosage of antipsychotic medication. The exact pathophysiology of NMS is not fully understood, but it is thought to involve an imbalance between dopamine and serotonin neurotransmission. The blockade of dopamine D2 receptors in the nigrostriatal pathway may lead to an increase in dopamine release in the striatum, which can cause an excessive activation of the dopaminergic neurons. This results in the characteristic symptoms of NMS, including muscle rigidity, fever, autonomic dysfunction, and altered mental status.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because NMS is not directly related to the use of antidepressant medications. While antidepressants can cause serotonin syndrome, a different condition characterized by excessive serotonin levels, NMS is specifically associated with antipsychotic medications.

**Option B:** This option is incorrect because NMS is not typically associated with a decrease in body temperature. In fact, one of the hallmark symptoms of NMS is hyperthermia, or an elevated body temperature.

**Option C:** This option is incorrect because NMS is not directly related to the use of benzodiazepines. While benzodiazepines may be used to treat some of the symptoms of NMS, such as agitation or muscle rigidity, they are not a causative factor in the development of the condition.

**Option D:** This option is incorrect because NMS is not typically associated with a decrease in blood pressure. In fact, one of the characteristic features of NMS is hypertension or an elevated blood pressure.

**Clinical Pearl / High-Yield Fact**
A key feature of NMS is the presence of muscle rigidity, which is often described as "lead pipe" rigidity. This type of rigidity is characterized by a fixed, board-like stiffness of the muscles, which can be difficult to distinguish from other conditions such as catatonia or malignant hyperthermia.

**Correct Answer:** B.