Find the rule: 2, 3, 5, 7, 11, 13, x, 19, 23, 29, what is x? A17 B15 C19

Find the rule: 2, 3, 5, 7, 11, 13, x, 19, 23, 29, what is x? A17 B15 C19

a
This is to find the law of prime numbers