A 60 years old man presents with a six month history of poor sleep and loss of interest

A 60 years old man presents with a six month history of poor sleep and loss of interest. He has
become forgetful recently and answers most of the questions with “I don’t Know”. What is the most
likely diagnosis?

A. Bipolar affective disorder
B. Depression
C. Normal Ageing Process
D. Dementia
E. Dyslexia