<prompt> Most common type of phagus in twins?CraniophagusPygophagusThorachophagusIschiophagus  <response>: c. ThorachophagusRef: Nelsons 20e p 820Conjoined twins Also called Siamese twinsResult 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 