<prompt> After coming head of breech will have difficulty in delivery in all of the following condition s except:HydrocephalusPlacenta preIncomplete dilation of cervixExtension of head  <response>: Placenta prae Defined as a placenta located paly or completely in the lower uterine segment.The bleeding is called inevitable or unavoidable haemorrhage as dilatation of internal os inevitably results in haemorrhage refer pgno:128 Sheila textbooks of obstetrics 2 nd edition 