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: Forensic Medicine
[{'content': 'A 25 year old person sustained injury in right eye. He developed right corneal opacity following the injury. Left eye was already having poor vision. Corneoplasty of right eye was done and vision was restored. Medicolegally such injury is labelled as: \nSelect and explain. \nA. Grievous, B. Simple, C. Dangerous, D. Serious', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Grevious', 'role': 'assistant'}]