This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular trauma , 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 fractures are usually the result of high-energy injuries. They may be anteriorly continuous with an injury to the supraorbital rim or frontal sinus, or they may extend posteriorly to the superior orbitalfissure Ref khurana 6/e 402', 'role': 'assistant'}]