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: Forensic Medicine
[{'content': 'Cavett test is used for detection of \nSelect and explain. \nA. Opiates, B. Alcohol, C. Barbiturates, D. Cocaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Test for alcohol :\n\nCavett test\nKozelka and thine test\nAlcohol dehydrogenase test\nGas chromatography (Most specific)', 'role': 'assistant'}]