Which of the following is a diagnostic test for anxiety disorder?

A. "Made up" words. This describes neologisms, where individuals create new, nonsensical words that have meaning only to them. It is often seen in schizophrenia and other psychotic disorders.

B. Repeating of another's words. This describes echolalia, a speech disturbance where individuals involuntarily repeat words or phrases spoken by others. It is common in autism spectrum disorder, catatonia, and some neurological conditions.

C. Thought of the speaker wanders off in another direction. Tangentiality occurs when a person's train of thought drifts away from the original topic and never returns to it. Unlike circumstantial speech, where the person eventually returns to the point, tangential thinking leads to incoherent, off-topic responses, commonly seen in schizophrenia, mania, and cognitive disorders.

D. Meaningless rhythm of words. This describes word salad, where speech consists of random, disorganized, and nonsensical words without logical structure. It is a severe thought disorder seen in advanced schizophrenia or delirium.

A. Gabapentin is an anticonvulsant and neuropathic pain medication that has no role in treating enuresis. It works by modulating calcium channels and is primarily used for seizures, neuropathic pain, and restless leg syndrome.

B. Laxatives. While constipation can contribute to enuresis by exerting pressure on the bladder, laxatives do not directly treat bedwetting. Instead, addressing constipation may help reduce nocturnal enuresis in some cases.

C. Desmopressin (DDAVP) is the first-line pharmacologic treatment for enuresis. It is a synthetic analog of antidiuretic hormone (ADH, vasopressin) that reduces night-time urine production, making it effective for nocturnal enuresis (bedwetting) in children.

D. SSRIs. Selective serotonin reuptake inhibitors (SSRIs) are used for depression, anxiety, and OCD but have no primary role in enuresis treatment. In some cases, they may actually cause urinary retention or incontinence as a side effect rather than improving enuresis.