What should come in place of the question mark (?) in the given series?

9, 13, 21, 33, 49, ?​​​

Given: 9, 13, 21, 33, 49, ?​​

Logic: Double difference is increasing + 4 place.

13 - 9 = 4

21 - 13 = 8

33 - 21 = 12

49 - 33 = 16

The difference are 4, 8, 12 and 16

So, the next difference is 20.

49 + 20 = 69

So, the missing term is 69.

Thus, correct option is (c).