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: Medicine
[{'content': "Lateral medullary syndrome (Wallenberg syndrome) is characterized by all, Except : \nSelect and explain. \nA. Giddiness, B. Dysphagia, C. Crossed hemianaesthesia, D. Homer's syndrome is rare", 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer is D (Horner's syndrome is rare): Horner's syndrome forms pa of the constellation of manifestations seen in lateral medullary syndrome or Wallenberg syndrome. It is produced as a result of infUrction of the descending sympathetic tract. Ipsilateral Homer's syndrome", 'role': 'assistant'}]