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': "All of the following are components of Horner's syndrome except - \nSelect and explain. \nA. Ptosis, B. Exophthalmos, C. Anhidrosis, D. Loss of cilio- spinal reflex", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]