Answer: B) gas chromatography
Gas chromatography is the reliable technique to measure the blood alcohol concentration of the arrested person after the sobriety test. This analysis gives a quantitative result in the form of gas chromatograph. The alcohol even in the small amount in blood can be detected by this approach. The computerized chromatograph generated after process is useful for presenting in the court of law. Therefore, the technique can be used for a more accurate BAC estimation at the time of arrest of the suspect.
