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: Anaesthesia
[{'content': 'In which plane of anaesthesia, movement of eyeball is lost – \nSelect and explain. \nA. Stage 3, Plane 1, B. Stage 1, Plane 3, C. Stage 2, Plane 3, D. Stage 4', 'role': 'user'}, {'content': 'Answer: A \nExplanation: At the end of plane 1 of stage III, eye ball becomes fixed.', 'role': 'assistant'}]