The given series is a combination three alternate series of
2, 3, 4
5, 6, 7
10, 18, 30
In the series 10, 18, 30
10 + 8 = 18
18 + 8 = 26
26 should be in the place of 30
$$\therefore\ $$30 is the wrong number in the given series.
Hence, the correct answer is Option C
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