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': 'Which among the following is computer controlled injection system: \nSelect and explain. \nA. WAND., B. TENS., C. Denti patch., D. Jet injections.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is a computer controlled injection system in which dosage is controlled by computer.', 'role': 'assistant'}]