This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Anatomy
[{'content': "All are the components of Horner's syndrome except: \nSelect and explain. \nA. Miosis, B. Ptosis, C. Anhidrosis, D. Exophthalmos", 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. D. ExophthalmosHorner's syndrome, also known as oculosympathetic paresis, is a combination of symptoms that arises when a group of nerves known as the sympathetic trunk is damaged. The signs and symptoms occur on the same side (ipsilateral) as it is a lesion of the sympathetic trunk. It is characterized by miosis (a constricted pupil), partial ptosis (a weak, droopy eyelid), apparent anhydrosis (decreased sweating), with apparent enophthalmos (inset eyeball).", 'role': 'assistant'}]