<prompt> The following observation can be seen in which of the following disease ?OCDTourette SyndromeRett syndromeAnxiety disorder  <response>: Tourettes syndrome is a form of tic disorder in which there are multiple motor tics and one or more vocal tics. The most common comorbidity with Tourettes syndrome Tourettes disorder is ADHD followed by OCD. The onset is usually between 4 and 6 years of age, symptoms peak between 10 and 12 years of age. 