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: Dental
[{'content': 'Computer controlled injection system is called: \nSelect and explain. \nA. CCD, B. WAND, C. CCI, D. JET', 'role': 'user'}, {'content': 'Answer: B \nExplanation: WAND:\nIt is computer controlled injection system Dosage is controlled by computer.', 'role': 'assistant'}]