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': 'The least common type of intussuception is - \nSelect and explain. \nA. Multiple, B. Colocolic, C. Ileoileal, D. Ileoilecolic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Types of intussusceptions in decreasing order\n\nIleocolic (~77%)\nIleo-ileo-colic (~12)\nIleoileal (~5%)\nColocolic (~2%)\nMultiple (1%)\nRetrograde', 'role': 'assistant'}]