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
A 25-year-old person developed right corneal opacity following injury to the eye. Comeoplasty of right eye was done and vision was restored. Medico-legally such injury is: TN 06; NEET 14 
Select and explain. 
A. Grievous, B. Simple, C. Dangerous, D. Serious
A: Grievous
Answer: A: Grievous 
Explanation: Ans. Grievous