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: Gynaecology & Obstetrics
[{'content': 'A double headed monster is known as a : \nSelect and explain. \nA. Diplopagus, B. Dicephalus, C. Craniopagus, D. Heteropagus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dicephalus', 'role': 'assistant'}]