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': 'This eyes sign is most likely seen in which condition: \nSelect and explain. \nA. Medial medullary syndrome, B. Lateral medullary syndrome, C. Optic chiasma lesion, D. Benedict syndrome', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. B. Lateral medullary syndromea. Above image shows Ptosis of right eye.b. This shows paralysis of IIIrd Nervec. Lateral Medullary syndrome (Wallenberg Syndrome) is a neurologic disorder due to ischemia of lateral part of Medulla d/t involvement of Posterior inferior cerebellar artery (PICA)d. It is characterized by ipsilateral loss of pain & temperature from face & contralateral loss from body.e. Ipsilateral Horner's Syndrome (Ptosis, Miosis, Anhidrosis)", 'role': 'assistant'}]