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A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
-4, ?, 3, 8, 14, 21
It follows the sequence of n+(a+1) Where a is a natural number sequence starting from 3.
-4 + 3 = -1
-1 + 4 = 3
3 + 5 = 8
8 + 6 = 14
14 + 7 = 21
Hence Option D is correct
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