A 40 year old chronic alcoholic is brought to the hospital emergency room with acute onsent of seeing snakes all around him in the room, not recognizing family members, violent behavior and tremulousness for few hours. He has missed the alcohol drink since 2 days. Examination reveals increased blood pressure, tremors, increased psychomotor activity, fearful affect, hallucinatory behaviour, disorientation, impaired judgement and insight. What is he is most likely to be suffering from?