This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Mode of trauma in petrous bone fracture \nSelect and explain. \nA. Longitudinal, B. Transverse, C. Mixed, D. Any complete fracture', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (Longitudinal) (97-Dhingra 4th) (698- Bailey & Love 25th)* The otic capsule is the hardest bone in the body. If trauma to the head is severe. Temporal bone fractures may occur. These tends to be either longitudinal (80%) or Transverse (20%)* Transverse fracture usually involve the labyrinth and lead to a sensorineural hearing loss that is permanent* Fracture of temporal bone may be longitudinal, transverse or mixed* Facial palsy is seen in more often in transverse fracture (50%)', 'role': 'assistant'}]