<prompt> Cavett test done for -Urine alcohol levelBlood alcohol level.Urine ethylene glycolBlood ethylene glycol  <response>: B Blood alcohol level537- KSN Reddy 31th Blood is the most suitable and most direct evidence of the concentration of alcohol in brain. Methods used for determining blood alcohol are:1. Kozelka and Hine test2. Cavett testBasic principle is a reduction of potassium bichromate by the test substance. For medicolegal purposes, the most desirable is chromatography in which specificity can be ascertained. Fatal dose - 15 to 250 ml of absolute alcohol consumed in one hour. Widmarks formula helps in the measurement of blood alcohol level. CAGE - Questionnaire or SAD - Questionnaire is to check toxicity after Alcohol. Delirium Tremens - occurs in chronic alcoholics due to:1. Temporary excess2. Sudden withdraw of alcohol3. Shock after receiving an injury such as fracture of a bone4. From acute infection such as pneummia, influenzae, erysipelas. Muttering delirium is seen with Dhatura. Marquiss test for Opium. Marshs test and Reinschs test for Arsenic. Ethylene glycol-antidote is - Fomipizole. Hangover following alcohol consumption can be treated with Thiamine.ETHYLENE - GLYCOL - Used as a antifreeze, not absorbed through skin, metabolised to glvcoaldehvde, glycolic acid and oxalic acid. It inhibits oxidative phospharylationTreatment -ethanol hemodialysis. Gcttlers test in done for death by Drowning. Test for identification of seminal stains:1. Acid phosphatase2. Flourance test3. Barberios test - gives crystals of spermin-picrate. 