Final answer:
The lavender-top tube would be drawn first. It is used for hematological tests and contains an anticoagulant to prevent blood clotting.
Step-by-step explanation:
The first evacuated tube to be drawn first would be the lavender-top tube. This type of tube is typically used for hematological tests, such as complete blood counts. It contains an anticoagulant called ethylenediaminetetraacetic acid (EDTA) which prevents blood from clotting. The lavender-top tube is used to collect and store whole blood for analysis.