Which is not a rational number 0.77777... 11/13 √(19) or -123/11​

Question

Which is not a rational number

0.77777...
11/13

`√(19)`
or -123/11​

Answer 1

the square root of 19 because it has no rational value

Answer 2

the square root of 19

Explanation:

this is because it has no rational value