Answer :

If we see that, in the given series, d = 2


So if e continue the series, we get :


5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25 …….


We can see that, the prime nos. In the above are :


5, 7, 11, 13, 17, 19, 23, …


so here we see that the sixth term which is prime is 19


the correct option is (b)

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