This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: ENT
[{'content': 'CSF Otorrhea is due to involvement/trauma of: \nSelect and explain. \nA. Cribriform plate, B. Petrous temporal bone, C. Parietal bone, D. Tympanic membrane', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CSF otorrhea - CSF coming from ear due to trauma to petrous temporal bone. CSF Rhinorrhea - CSF watery discharge from nose', 'role': 'assistant'}]