This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical injuries, Subject name: Forensic Medicine
In a patient of unilateral loss of vision, the patient had injury to opposite eye leading to corneal opacification. The patient was operated by corneal grafting, he could see clearly again with one eye. The injury is said to be - 
Select and explain. 
A. Simple, B. Grievous, C. Dangerous, D. Hazardous
B: Grievous
Answer: B: Grievous 
Explanation: The synopsis of forensic medicine & toxicology;Dr k.s narayan reddy; 28th edition; pg.no.155; There is permanent privation (loss) of sight of one eye,therefore its a grievous hu.