Which of the syringes would be the best choice to administer 10 units of insulin?

A. Syringe 1: This syringe is the best choice because it has a 30-unit capacity and is calibrated in fine, single-unit increments. The 10-unit dose occupies a substantial portion of the syringe's total volume, making the markings clear and easy to read. This ensures the most accurate and precise measurement of the small 10-unit dose, thereby minimizing the risk of a medication error. B. Syringe 2: This syringe is a U-100 insulin syringe with a 50-unit capacity, which is an acceptable device for insulin administration. However, for a small dose of 10 units, a syringe with a smaller total capacity is preferred. C. Syringe 3: This syringe is an inappropriate choice for a dose of only 10 units because its capacity is far greater than the required dose. The markings are spaced widely apart, which makes it difficult to accurately and safely measure a small amount of insulin, increasing the risk of a dosing error. D. Syringe 4: This syringe is not an insulin syringe. It is a tuberculin syringe, which is calibrated in milliliters (mL), not units. Insulin must be measured in units to ensure a safe and accurate dose.