Funny break

Infinity is NOT a real number. Negative infinity is NOT a real number. 0 IS a real number! Or you can say infinity and negative infinity are UNREAL numbers while 0 is a REAL number. .

$\infty$ isn't a real number but $0$ is a real number. So $0^2 =$ $0$

anything^2 can not be negative. but can be 0.

so, the minimum value is 0.

Minimum is 0 as - infinity do not make any sense !

Infinity is not a real number. So, mimum value of $x^2$ is at $x = 0$ . So, the answer is $0^2 = \color{#69047E}{\boxed{0}}$ .

As I observed the choices, infinity is a imaginary number, which is undefined, especially the negative infinity, so the answer is $0$ .