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