**Core Concept**
Buspirone is an anxiolytic medication that belongs to the azaspirone class. It is primarily used in the treatment of generalized anxiety disorder (GAD). Buspirone's mechanism of action is distinct from other anxiolytics like benzodiazepines, which interact with GABA receptors.

**Why the Correct Answer is Right**
Buspirone acts as a selective serotonin 5-HT1A receptor partial agonist. By stimulating the 5-HT1A receptors in the presynaptic neurons, buspirone decreases the release of serotonin. This action is thought to contribute to its anxiolytic effects. Buspirone also has some activity at dopamine receptors, particularly D2 receptors, which may contribute to its efficacy in treating anxiety.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as buspirone does not act as an antagonist at GABA receptors, which is a characteristic of benzodiazepines.
**Option B:** This option is incorrect as buspirone does not act as a direct inhibitor of the enzyme monoamine oxidase (MAO).
**Option C:** This option is incorrect as buspirone does not act as a direct antagonist at the NMDA receptor, which is a characteristic of some anesthetics and anticonvulsants.

**Clinical Pearl / High-Yield Fact**
Buspirone's anxiolytic effects are distinct from those of benzodiazepines and other anxiolytics, which can be habit-forming and may have sedative effects. Buspirone's efficacy in treating GAD is well-established, but it may take 2-4 weeks for its full effects to manifest.

**Correct Answer:** C.