Which of these is a number pattern that goes up by 2 and then down by 1?
1, 3, 4, 6, 7, 9, 10
4, 6, 8, 9, 11, 13, 12
3, 5, 7, 8, 10, 12, 11
2, 4, 6, 5, 7, 9, 8

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