**Core Concept**
Obsessive-Compulsive Disorder (OCD) is a neuropsychiatric condition characterized by intrusive thoughts (obsessions) and repetitive behaviors (compulsions). Effective treatment modalities aim to alleviate symptoms and improve quality of life.

**Why the Correct Answer is Right**
OCD treatment typically involves a combination of pharmacological and psychological interventions. Antidepressant medications, particularly Selective Serotonin Reuptake Inhibitors (SSRIs), are commonly used to reduce symptoms of OCD. Behavioral therapies, such as Exposure and Response Prevention (ERP), are also effective in managing OCD. In some cases, deep brain stimulation (DBS) may be considered for severe, treatment-resistant OCD.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while benzodiazepines may provide temporary relief from anxiety symptoms, they are not a recommended treatment for OCD due to the risk of dependence and withdrawal.
**Option B:** This option is incorrect because antipsychotic medications are generally not considered first-line treatment for OCD, although they may be used in combination with SSRIs for more severe cases.
**Option C:** This option is incorrect because although electroconvulsive therapy (ECT) is used to treat various psychiatric conditions, it is not a standard treatment for OCD.

**Clinical Pearl / High-Yield Fact**
It's essential to note that a combination of pharmacotherapy and behavioral therapy is often more effective than either treatment alone in managing OCD symptoms.

**Correct Answer: D. ECT. ECT is not a standard treatment for OCD.**