Answer:
The correct option is A.
Step-by-step explanation:
A real number is called a rational number if it can be represented as p/q, where p and q are two integers and q≠0. For example: 2,4/5, 0.2.
A real number is called an irrational number if it can not be represented as p/q, where p and q are two integers and q≠0. For example: π, √2, 2.333....
In option A, all numbers are irrational numbers.
Therefore option A is correct.
In option B,
[tex]\sqrt{9}=3[/tex]
3 is a rational numbers, so √9 is a rational number.
Therefore option B is incorrect.
In option C,
[tex]\sqrt{144}=12[/tex]
12 is a rational numbers, so √144 is a rational number.
Therefore option C is incorrect.
In option D,
[tex]\sqrt{121}=11[/tex]
11 is a rational numbers, so √121 is a rational number.
Therefore option D is incorrect.
