You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Delirium is distinguished from dementia by the presence of and explain in detail?
Ans.C. Clouding of consciousnessThe hallmark of delirium is fluctuation in the level of consciousness.Periods of lucency may be interspersed with periods of marked unresponsiveness.Another distinguishing feature is that the onset of delirium usually occurs within hours or days, whereas the onset of dementia may be insidious throughout weeks to months.