What comes next in the sequence?

4, 2, 5, 9, 5, 11, 13, 7, 16, 17,

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✪ Choose the correct option.

What comes next in the sequence?

4, 2, 5, 9, 5, 11, 13, 7, 16, 17, 9

A. 31
B. 22
C. 12
D. 21

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