This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Dementia Due to Metabolic Causes, Subject name: Psychiatry
Which of the following present with loss of consciousness: 
Select and explain. 
A. Schizophrenia, B. Dementia, C. Mania, D. Organic brain syndrome
D: Organic brain syndrome
Answer: D: Organic brain syndrome 
Explanation: Ans. (d) Organic brain syndromeORGANIC BRAIN SYNDROME* It is also known as organic brain disease which is decreased mental function due to a medical disease, other than a psychiatric illness.* Cognitive or higher mental functions (i.e. consciousness, orientation & abstract thinking) are impaired in organic brain syndrome.