This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
True about dementia is A/E 
Select and explain. 
A. Hallucination are not common, B. Clouding of consciousness is common, C. Nootropics have limited role, D. All
B: Clouding of consciousness is common
Answer: B: Clouding of consciousness is common 
Explanation: B i.e. Clouding of consciousness is common Clouding of consciousness is a characteristic feature delirium & is helpful in differentiating it from dementiaQ. Two most common causes of dementia are Alzheimer's & multi infarct; both of which are irreversible.