what comes next in the following pattern ?

1, 2, 4, 7, 11, 16, _________

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• A 22
• B 21
• C 20
• D 19

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Answer: A. 22

1, 2, 4, 7, 11, 16, _________

1+1 = 2
2+2 = 4
4+3 = 7
7+4=11
11+5=16
16+6=22

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