This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanical injuries, Subject name: Forensic Medicine
'Fracture-ala signature' or signature fracture is - 
Select and explain. 
A. Gutter fracture & Contre copup injury, B. Depressed fracture of skull, C. Ring fracture at foramen magnum, D. Sutural separation
B: Depressed fracture of skull
Answer: B: Depressed fracture of skull 
Explanation: The synopsis of forensic medicine &toxicology Dr k.s narayan reddy ;28th edition; pg.no. 140 . Depressed fractures produced by local deformation of skull ,caused by a heavy weapon with small striking surface. These are also called FRACTURE A LA SIGNATURE (SIGNATURE FRACTURE)