A clock strikes once at 1 o'clock, twice at 2 o'clock and thrice at 3 o'clock, and so on. If it takes 12 seconds to strike at 5 o'clock, what is the time taken by it to strike at 10 o'clock?

• A. 20 seconds
• B. 24 seconds
• C. 28 seconds
• D. 30 seconds