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: Ophthalmology
In unilateral past pointing nystagmus the site of lesion is: 
Select and explain. 
A. Cerebellar hemisphere, B. Lateral semicircular canal, C. Flocculo-nodular lobe, D. Superior semicircular canal
A: Cerebellar hemisphere
Answer: A: Cerebellar hemisphere 
Explanation: Ans. Cerebellar hemisphere