This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
Perseveration is - 
Select and explain. 
A. Persistent and inappropriate repetition of the same thoughts, B. When a patient feels very distressed about it, C. Characteristic of schizophrenia, D. Characteristic of obsessive compulsive disorder (OCD)
A: Persistent and inappropriate repetition of the same thoughts
Answer: A: Persistent and inappropriate repetition of the same thoughts 
Explanation: Perseveration is continuing with a verbal response which was initially appropriate, However, thereafter there is persistent and inappropriate repetition of the same verbal response.