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
A alcoholics addicted presents in emergency with irrelevant talking & disoriented to time, place and person there is H/O not taking alcohol from last 3 days & no head injury. He also have visual hallucination. The diagnosis? 
Select and explain. 
A. Dementia praecox, B. Delirium tremens, C. Schizophrenia, D. Korsakoff psychosis
B: Delirium tremens
Answer: B: Delirium tremens 
Explanation: B i.e. Delirium tremens