Psychiatry General fae0be2a All of the following are true about alcohol abuse except A Alcoholic hallucinosis is seen after 12-24 hours of alcohol withdrawl B MCV is decreased in chronic alcoholics C Widmark formula is used to calculate blood alcohol concentration D CAGE questionnaire is used as screening test for alcohol abuse High-Yield Explanation MCV is found to be elevated because of dietary deficieny & impaired absorption of Folic acid in chronic alcoholics.