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': 'All are true regarding periventricular leukomalacia except \nSelect and explain. \nA. Appear as echolucent areas (cysts) on neuroimaging in preterm neonate., B. Require atleast 2 weeks to form., C. Presence at birth helps to determine timing of hemorrhagic event., D. Cystic areas in grey matter of brain that develop after ischemic infarction.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Periventricular leukomalacia - refers to cystic areas deep in white matter of brain that develop after hemorrhagic or ischemic infarction.', 'role': 'assistant'}]