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
[{'content': "False about Horner's syndrome \nSelect and explain. \nA. Lack of sympathetic innervation, B. Loss of ciliospinal reflex, C. Horner's pupil dilates with topical cocaine, D. Confirmatory tests; dilation lag and cocaine test", 'role': 'user'}, {'content': "Answer: C \nExplanation: In cocaine test - normal pupil dilates whereas Horner's pupil doesnot.", 'role': 'assistant'}]