If three groups could be formed using the given figures only once, these groups would be _____.
1
(1, 5, 8), (2, 4, 7) and (3, 6, 9)
2
(1, 5, 7), (2, 4, 9) and (3, 6, 8)
3
(1, 5, 7), (2, 6, 8) and (3, 4, 9)
4
(1, 5, 7), (2, 4, 8) and (3, 6, 9)
If three groups could be formed using the given figures only once, these groups would be _____.