A nurse is preparing to administer 10 units of regular insulin and 20 units of NPH insulin to a client. What is the sequence of events the nurse should follow?

Roll NPH vial between palms of hands, Inject air into NPH insulin vial, inject air into regular insulin vial, Withdraw short-acting insulin into syringe, add intermediate insulin to syringe. Inspect vials for contaminants

Inspect vials for contaminants, Roll NPH vial between palms of hands. Inject air into NPH insulin vial, inject air into regular insulin vial. Withdraw short-acting insulin into syringe, Add intermediate insulin to syringe.

Inspect vials for contaminants. Inject air into NPH insulin vial. Inject air into regular insulin vial, Withdraw short-acting insulin into syringe. Add intermediate Insulin to syringe, Roll NPH vial between palms of hands

inject air into NPH insulin vial, Inject air into regular insulin vial, Withdraw short-acting insulin into syringe, Roll NPH vial between palms of hands, inspect vials for contaminants, add intermediate insulin to syringe