For Regular insulin used in meals, which description matches its onset, peak, and duration?

• A. Onset 0-15 minutes, peak 1-2 hours, duration 3-5 hours
• B. Onset 15-30 minutes, peak 1-2 hours, duration 4-6 hours
• C. Onset 2-3 hours, peak 4-6 hours, duration 6-12 hours
• D. Onset 30-60 minutes, peak 2-4 hours, duration 5-8 hours

Answer: (D)