Final answer:
Insulin can be left in the syringe for up to 24 hours without any significant loss of effectiveness.
Step-by-step explanation:
The correct answer is d) 24 hours.
Insulin can be left in the syringe for up to 24 hours without any significant loss of effectiveness. However, it is important to follow proper storage and handling guidelines to ensure the insulin remains stable and effective.
Keep in mind that insulin should be stored in a cool place, away from extreme heat or cold, and should not be exposed to direct sunlight. Additionally, insulin should not be shaken vigorously or frozen. If you have any concerns or doubts about the effectiveness of the insulin, it is always best to consult with a healthcare professional.