Which of the following is the best example of autistic self-stimulation a. Mastery of a profession or occupation b. Repeating phrases that one hears c. Continuing to line up blocks for no apparent reason d. Robotic language

c. Continuing to line up blocks for no apparent reason is the best example of autistic self-stimulation, also known as stimming.

The best example of autistic self-stimulation among the given options is c. Continuing to line up blocks for no apparent reason. Autistic self-stimulation, also known as stimming, refers to repetitive behavior or movement commonly observed in individuals with autism. In this case, the act of lining up blocks repeatedly without a clear purpose would be considered as stimming behavior.