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
"Confusional assessment method" is used for : 
Select and explain. 
A. Dementia, B. Schizophrenia, C. Bipolar disorder, D. Delirium
D: Delirium
Answer: D: Delirium 
Explanation: Delirium is an organic brain disorder of acute onset & fluctuating course characterized by altered sensorium / disturbed consciousness.
Confusional assessment method & bed side tests like MMSE are used to evaluate delirium.