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: Medicine
[{'content': 'Parinaud syndrome is caused by damage to \nSelect and explain. \nA. Anterior commisure, B. Posterior commisure, C. Medial commisure, D. Lateral commisure', 'role': 'user'}, {'content': "Answer: B \nExplanation: Answer- B. Posterior commisureAlso known as dorsal midbrain syndrome, this is a distinct supranuclear veical gaze disorder caused by damage to the posterior commissure.Pineal region tumors, cysticercosis, and stroke also cause Parinaud's syndrome.", 'role': 'assistant'}]