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: ENT
[{'content': 'The site of lesion in unilateral past pointing nystagmus is- \nSelect and explain. \nA. Posterior semicircular canal, B. Superior semicircular canal, C. Flocculonodular node, D. Cerebellar hemisphere', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]