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: Surgery
[{'content': "Acute pseudo-obstruction of the colon known as- \nSelect and explain. \nA. Sj ogren' s syndrome, B. Gardner's syndrome, C. Ogilivie's syndrome, D. Peutz-jegher's syndrome", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]