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
Repetitive times work doing for premonition of ? 
Select and explain. 
A. Obscession, B. Compulsion, C. Anxiety, D. None
B: Compulsion
Answer: B: Compulsion 
Explanation: Ans. B. CompulsionRepetitive irresistable thoughts > Obsession.Repetitive purposeful behavior (work doing) > compulsion.