This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Forensic Medicine
[{'content': 'A person met with an accident and suffer from middle cranial fossa fracture There was a bluish purple colour behind mastoid What is your probable diagnosis \nSelect and explain. \nA. Battle sign, B. Bezold sign, C. Laceration, D. Aberration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ref : narayana reddy', 'role': 'assistant'}]