Inspection of nasal bone, external approach

A occurs when one of the coronary arteries is blocked, preventing blood from getting to

heart muscle. A. cardiac tamponade C. myocardial infarction B. myocardial dysplasia D. cardiac heart block

Which of the following techniques is a definitive means for both qualitative and quantitative analysis of drugs of abuse?

A. Thin layer chromatography (TLC) B. Gas chromatography coupled with mass spectrometry C. Spectrophotometry D. Osmometry