What is the usual site of intramuscular injection a nurse will choose in an adult for Z-track technique?

Correct option is C

The ventrogluteal site is the preferred site for Z-track technique in adults because it's deep, has fewer blood vessels and nerves, and allows medication to be sealed in the muscle. Explanation of each option: • (a) Deltoid – Suitable for smaller volume injections (≤1 mL), but not ideal for Z-track which needs a larger, deeper muscle. • (b) Rectus Femoris – Used sometimes but more painful and not typically chosen for Z-track in adults. • (c) Ventrogluteal – Correct. It's safe, large, and ideal for irritating or oily medications requiring Z-track method. • (d) Vastus lateralis – Preferred in infants and children, not adults for Z-track injections.