This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'A 28-year-old taxi driver is chronically consumed by fears of having accidentally run over a pedestrian. Although he tries to convince himself that his worries are silly, his anxiety continues to mount until he drives back to the scene of the "accident" and proves to himself that nobody lies hu in the street. This behavior is an example of which of the following? NOT RELATED - PSYCHIATRY \nSelect and explain. \nA. A compulsion secondary to an obsession, B. An obsession triggered by a compulsion, C. A delusional ideation, D. A typical manifestation of obsessive-compulsive personality disorder', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]