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: Pathology
[{'content': 'In children which of the following virus has been implicated in the pathogenesis of choroid plexus tumour? \nSelect and explain. \nA. Simian virus 40, B. HIV, C. Herpes simplex, D. Hepa s B', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Simian virus 40', 'role': 'assistant'}]