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
Which of the following is the most reliable method of estimating blood alcohol level ? 
Select and explain. 
A. Cavett's test, B. Breath alcohol anaylzer, C. Gas liquid chromatography, D. Thin layer Chromatography
C: Gas liquid chromatography
Answer: C: Gas liquid chromatography 
Explanation: Gas chromatography is most desirable method of alcohol estimation for medicolegal purpose.