Which of the following syringes should be used to measure 60 units of insulin?

A. tuberculin syringe: Tuberculin syringes are calibrated in milliliters (typically 1 mL total) and not in insulin units. Using them for insulin risks serious dosing errors due to miscalculation or misreading. B. U-100, 50 unit capacity insulin syringe: This syringe only holds up to 50 units of insulin. Since the ordered dose is 60 units, this syringe is not large enough and should not be used for this administration. C. U-100, 100 unit capacity insulin syringe: This is the correct syringe for giving 60 units of insulin. It is specifically calibrated for insulin dosing and can measure up to 100 units accurately and safely. D. standard syringe: Standard syringes are usually marked in milliliters, not insulin units. Using them for insulin administration increases the risk of dosing errors and is not recommended for safety reasons.