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
[{'content': 'Biological amnesia is - \nSelect and explain. \nA. Lack of interest, B. Presenile dementia, C. Opioid addiction, D. Hypothyroidism', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Biological amnesia:- Head injury (concussion/brain bruises), drugs (Marijuana, alcohol), brain disease (Korsokoff syndrome, Brain tumors, multiple sclerosis, presenile dementia), temporary disturbances in brain blood supply, and transient global amnesia.\nPsychological amnesia :- Childhood amnesia, dream amnesia, defensive amnesia', 'role': 'assistant'}]