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: Surgery
Ophthalmoplegia is: 
Select and explain. 
A. Lack of eyeball movement, B. Lack of accommodation, C. Lack of blood supply to retina, D. Lack of vision
A: Lack of eyeball movement
Answer: A: Lack of eyeball movement 
Explanation: Ophthalmoplegia
→ Lack of eyeball movement.
→ Due to involvement of III, IV, V (Ophthalmic division), VI cranial nerve.
→ VI cranial nerve is most commonly involved in ophthalmoplegia.