This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Ocular dipping is seen in \nSelect and explain. \nA. Pontine damage, B. Medulla damage, C. Diffuse coical damage, D. Mid brain damage', 'role': 'user'}, {'content': 'Answer: C \nExplanation: "Ocular bobbing" describes brisk downward and slow upward movements of the eyes associated with loss of horizontal eye movements and is diagnostic of bilateral pontine damage, usually from thrombosis of the basilar aery."Ocular dipping" is a slower, arrhythmic downward movement followed by a faster upward movement in patients with normal reflex horizontal gaze; it usually indicates diffuse coical anoxic damage.Reference: Harrison&;s Principles of Internal Medicine; 19th edition; Chapter 328; Coma', 'role': 'assistant'}]