Use each of the following only once and form three groups. The three groups so formed are:

• A. (1, 9, 4), (3, 4, 6) and (2, 5, 8)
• B. (1, 9, 6), (3, 5, 7) and (2, 4, 8)
• C. (2, 9, 6), (3, 4, 7) and (1, 5, 8)
• D. (1, 9, 6), (3, 4, 7) and (2, 5, 8)