Which of the following is an example of a tic disorder?

Tourette syndrome is classified as a tic disorder due to its hallmark features of involuntary movements and vocalizations known as tics. Tics can take the form of sudden, rapid, recurrent motor movements (such as blinking or head jerking) or vocalizations (like throat clearing or grunting). This condition typically manifests in childhood and can be characterized by both motor and vocal tics, often fluctuating in severity. Distinctively, tic disorders are typically categorized separately from other psychiatric disorders, focusing on their unique symptoms of involuntary behavior.

The other options, while significant mental health conditions, do not fall under the category of tic disorders. Obsessive-compulsive disorder (OCD) involves persistent, unwanted thoughts and repetitive behaviors, such as rituals, which are distinct from tics. Schizophrenia is a severe mental disorder characterized by disruptions in thought processes, perceptions, and emotional responsiveness, none of which involve the involuntary movements typical of tic disorders. Generalized anxiety disorder relates to excessive anxiety and worry about various aspects of life, rather than the involuntary behaviors seen in tics. Thus, Tourette syndrome is the clear example of a tic disorder among the provided choices.