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
CSF Otorrhea is due to involvement/trauma of: 
Select and explain. 
A. Cribriform plate, B. Petrous temporal bone, C. Parietal bone, D. Tympanic membrane
B: Petrous temporal bone
Answer: B: Petrous temporal bone 
Explanation: CSF otorrhea - CSF coming from ear due to trauma to petrous temporal bone. CSF Rhinorrhea - CSF watery discharge from nose