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
All are true about dementia except 
Select and explain. 
A. Loss of sho term memory, B. Loss of long term memory, C. Deterioration of personality, D. Impaired learning
B: Loss of long term memory
Answer: B: Loss of long term memory 
Explanation: Dementia is a chronic organic mental disorder, characterized by the following main clinical features: 1. Impairment of intellectual functions, 2. Impairment of memory (predominantly of recent memory, especially in early stages), 3. Deterioration of personality with lack of personal care. Reference: A sho textbook of Psychiatry by Niraj Ahuja, page no.22.