On warfarin, confusion since three days (225/1700)

A 78yo lady on warfarin for atrial fibrillation lives in a care home. She presents with hx of
progressive confusion for three days. She was also noticed to have bruises on her arms. INR = 7.
What is the most probable dx?
a. Alzheimersb. Delirium
c. Subdural hemorrhage
d. Vascular dementia
e. Pick’s dementia

Subdural hemorrhage: Fluctuating consciousness, in this case confusion, history of anticoagulants...focal signs are late usually