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