A 60-yr-old man with a complaint of progressive dementia for the past 6 months with intermittent jerky movement involving the whole body from 2 days. EEG showed periodic sharp biphasic waves. Diagnosis is -: (A) Alzheimer's, (B) Creutzfeld Jakob disease, (C) Lewy body dementia, (D) Herpes simplex encephalitis
Answer is B. None