Question

if gray, green, and lavender tubes are needed, the correct order of draw is
gray, green, lavender
green, lavender, gray
gray, lavender, green
lavender, gray, green

Explanation:

In phlebotomy, the order - of - draw is important to prevent cross - contamination and ensure accurate test results. Lavender (EDTA) tubes are drawn first as they are for hematology tests and are least likely to be affected by other additives. Green (sodium heparin) tubes are drawn next, and gray (sodium fluoride/potassium oxalate) tubes are drawn last.

Answer:

Lavender, green, gray (none of the given options are correct as per standard phlebotomy order - of - draw).