Question

Which of the following is irrational?
A)
$\sqrt \frac{4}{9}$
B)
$\sqrt{} \frac{12}{13}$
C)
$\sqrt{7}$
D)
$\sqrt{81}$
​

Answer 1

option d is correct because because I rational number expressed as a ratio number

Answer 2

Answer:

might be C and D

Step-by-step explanation:

because rational number is always in a fraction p/q form....