Which of the following is an example of a hyperkinetic extrapyramidal syndrome?

Correct answers are A), B) and C). A) Correct. Chorea is a hyperkinetic extrapyramidal syndrome characterized by involuntary, rapid, jerky, and non-repetitive movements. B) Correct. Tics are also a hyperkinetic extrapyramidal syndrome, involving sudden, rapid, repetitive, and stereotyped movements or vocalizations. C) Correct. Dystonia is another example of a hyperkinetic extrapyramidal syndrome. It involves sustained or intermittent muscle contractions leading to abnormal postures or twisting movements. D) Incorrect. Parkinson's disease is not a hyperkinetic syndrome; it is a hypokinetic syndrome characterized by bradykinesia (slowness of movement), rigidity, and rest tremor, which are opposite to the characteristics of hyperkinetic syndromes like chorea, tics, and dystonia.