This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuro-ophthalmology, Subject name: Ophthalmology
[{'content': 'Ocular bobbing centre is \nSelect and explain. \nA. Midbrain, B. Pons, C. Medulla, D. Coex', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ocular bobbing centre is pons. Characterised by conjugate eye movements, beginning with a fast downward movement followed by slow drift back to midline. Causes : -comatose patient with massive pontine lesion - metabolic encephalopathy.', 'role': 'assistant'}]