This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New Born Infants, Subject name: Pediatrics
[{'content': 'Most common type of phagus in twins? \nSelect and explain. \nA. Craniophagus, B. Pygophagus, C. Thorachophagus, D. Ischiophagus', 'role': 'user'}, {'content': "Answer: C \nExplanation: c. Thorachophagus(Ref: Nelson's 20/e p 820)Conjoined twins (Also called Siamese twins)Result from relatively late monovular separation; Types depending on the site of connections are: thoraco-omphalopagus (28% of conjoined twins), thoracopagus (18%), omphalopagus (10%), craniopagus (6%) & incomplete duplication (10%)", 'role': 'assistant'}]