This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organic Mental Disorders, Subject name: Psychiatry
True about dementia is all except: 
Select and explain. 
A. Often irreversible, B. Hallucinations are not common, C. Clouding of consciousness is common, D. Nootropics have limited role
C: Clouding of consciousness is common
Answer: C: Clouding of consciousness is common 
Explanation: There is no disturbance of consciousness in dementia. It is often irreversible. The hallucination can be present but are not common. Nootropics (or cognitive enhancers) have very limited role in the management of dementia.