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: Ophthalmology
[{'content': 'Most common cause of fracture of roof of orbit \nSelect and explain. \nA. Blow on back of head, B. Blow on parietal bone, C. Blow on the forehead, D. Blow on the upper jaw', 'role': 'user'}, {'content': 'Answer: C \nExplanation: "Orbital roof fracture should be suspected in any child presenting with blunt injury to the brow or forehead with subsequent development of a hematoma of the upper lid in the hours following injury ". — Pediatric ophthalmology', 'role': 'assistant'}]