This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drug Abuse, Subject name: Forensic Medicine
Cavett test is used for the detection of ___ in blood 
Select and explain. 
A. Barbiturates, B. Alcohol, C. Opiates, D. Cyanides
B: Alcohol
Answer: B: Alcohol 
Explanation: Methods to find blood alcohol levels Cavett testQ Alcohol dehydrogenase method Kozelka & Hine test Gas chromatography (most specificQ) Breath analyser