**Core Concept**
Clozapine is an atypical antipsychotic medication primarily used to treat schizophrenia in patients who have not responded to other treatments. Its mechanism of action involves blockade of dopamine D2 and serotonin 5-HT2A receptors, which contributes to its therapeutic effects and side effect profile.

**Why the Correct Answer is Right**
Clozapine's side effect profile is distinct from typical antipsychotics due to its unique receptor binding properties. While it shares some common side effects with other antipsychotics, such as sedation and weight gain, it is less likely to cause extrapyramidal symptoms (EPS) due to its lower affinity for dopamine D2 receptors. However, clozapine is associated with a higher risk of agranulocytosis, a potentially life-threatening decrease in white blood cell count.

**Why Each Wrong Option is Incorrect**
* **Option A:** is incorrect because clozapine is actually known to cause agranulocytosis, a rare but serious side effect.
* **Option B:** is incorrect because clozapine is associated with sedation, which is a common side effect of many antipsychotics.
* **Option C:** is incorrect because weight gain is a known side effect of clozapine, likely due to its effects on serotonin and dopamine receptors.

**Clinical Pearl / High-Yield Fact**
To remember clozapine's unique side effect profile, consider the mnemonic "CLOZAPINE" where each letter stands for a key aspect of the medication:

C - Cardiovascular effects (e.g., orthostatic hypotension)
L - Leukopenia (decreased white blood cell count)
O - Orthostatic hypotension
Z - Zolpidem-like sedation
A - Agranulocytosis
P - Palpitations
I - Increased appetite
N - Nausea and vomiting
E - Electrolyte imbalances

**Correct Answer: A. Agranulocytosis.**