This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Regional Injuries, Subject name: Forensic Medicine
Battle sign is positive, if bruise in 
Select and explain. 
A. Orbital region, B. Occipital region, C. Mastoid region, D. Neck region
C: Mastoid region
Answer: C: Mastoid region 
Explanation: Ans. (C). Mastoid region(Ref: Review of Forensic Medicine & toxicology; Gautum Biswas; 2nd edition; Pg - 236)Bruising/ecchymosis over the mastoid processQ in the line of posterior auricular artery.It is an indication of fracture of middle cranial fossaQof the skull, and may suggest underlying brain trauma