Which one of these sentences sentences are grammatically correct
1. Butterfly is one of the toughest strokes in swimming and to some people it might take months to learn.
2. Butterfly is one of the toughest strokes in swimming and it might take months for some people to learn.
3. Butterfly is one of the toughest strokes in swimming and for some people it might take months to learn.
Thanks
2 and 3
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