This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
Which is an ominous sign in case of severe head injury 
Select and explain. 
A. Development of diabetes insipidus, B. Anisocoria, C. New focal deficit, D. Depressed skull fracture
B: Anisocoria
Answer: B: Anisocoria 
Explanation: Head Injury A sudden Enlargement (dilatation) of one pupil (anisocoria) is an ominous sign Abnormal posturing (decoicate posturing) a characteristic positioning of the limbs caused by severe diffuse injury or high ICP is an ominous sign Ref: Harrison's 19th edition Pgno :1774