खालीलपैकी 1 ते 20 पर्यंतच्या मूळ संख्येची शृंखला निवडा:

1
1, 2, 3, 5, 7, 11, 13, 17, 19
2
2, 5, 7, 9, 11, 13, 17, 19
3
3, 5, 7, 11, 13, 17, 19
4
2, 3, 5, 7, 11, 13, 17, 19

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